CN101447820A - Communication method, transmission apparatus and reception apparatus - Google Patents

Abstract

The invention discloses a communication method of a communication device, and a communication method and a communication system of a base station device, wherein wireless communication is carried out between the base station device with a plurality of base station side antennas and a communication terminal device of with more than one terminal antennas, and the communication method of the communication terminal device comprises: receiving signal from the base station device by the terminal side antennas; transmitting a feedback signal selected by the base station side antennas by the terminal side antennas. It is thereby possible to control a parameter of the modulation scheme or the like in consideration of relative relationships between channels, and it is thus possible to improve the reception quality.

Description

Communication means, transmitting apparatus and receiving equipment

Present patent application is dividing an application of following application:

Application number: 200380100621.7

The applying date: on November 26th, 2003

Denomination of invention: communication means, transmitting apparatus and receiving equipment

Technical field

The present invention relates to communication means, transmitting apparatus and receiving equipment in a kind of wireless communication system that when sending and receive, all utilizes many antennas.

Background technology

In recent years, MIMO (multiple-input and multiple-output) effectively utilized limited frequency band to realize that quick system for transmitting causes concern gradually as a kind of.

MIMO be a kind of with many antenna applications in the system that sends and receive, it utilizes a plurality of eigenvectors to send in identical time and identical frequency band and receives each independently signal, mimo system can increase transmission capacity under the situation that does not increase frequency band.

In this system, in order to improve throughput, transmitting apparatus is based on the parameter of the aspects such as received electric field strength control Adaptive Modulation processing of the entire system of receiving equipment place estimation, for example, when the received electric field strength of entire system was higher than predetermined threshold, transmitting apparatus then improved the processing of the number of modulation levels of multistage modulation.This is identical with traditional MIMO.

But, in utilizing multi channel communication, have each interchannel received electric field strength variation situation greatly, for example mimo system.When carrying out Adaptive Modulation when handling based on the received electric field strength of entire system among the MIMO, even under the situation of other channels, also can correspondingly improve number of modulation levels when the intensity of the reception electric field of individual channel.The result causes, the deterioration of the quality of reception in the channel that has very low received electric field strength in a large number.

Summary of the invention

A target of the present invention provides a kind of communication means, transmitting apparatus and receiving equipment, and it can improve in the quality of reception that sends and receive the wireless communication system of all using many antennas.

In mimo system, have such a case, promptly multiple signals (multiplexed signal) are because the state of channel matrix demultiplexing fully, and this just can't utilize the part of the received electric field strength of received signal to carry out demodulation process.Below, effective received electric field strength of being mentioned is exactly can be applied to carry out the received electric field strength of demodulation process in as mimo system sending and receive the radio communication of all utilizing many antennas.

Aforesaid target of the present invention by based on the received electric field strength of entire system and effectively the received electric field strength parameter of controlling aspect such as modulation system realize.

According to an aspect of the present invention, the communication means of communication terminal is provided, it is at the base station apparatus with a plurality of base station side antennas and have between the communication terminal of the end side antenna more than 1 and carry out radio communication, may further comprise the steps: use described end side antenna to receive step from the signal of described base station apparatus; With the feedback signal of the selection of relevant described base station side antenna step with described end side antenna transmission.

According to another aspect of the present invention, provide the communication means of communication terminal, it is at the base station apparatus with a plurality of base station side antennas and have between the communication terminal of a plurality of end side antennas and carry out radio communication; May further comprise the steps: use the step of described end side antenna reception from the signal of described base station apparatus; With the feedback signal of the selection of relevant described base station side antenna step with described end side antenna transmission.

According to another aspect of the present invention, provide the communication means of base station apparatus, it is at the base station apparatus with a plurality of base station side antennas and have between the communication terminal of the end side antenna more than 1 and carry out radio communication; May further comprise the steps: the step that the feedback signal of the selection of relevant described base station side antenna is received with described base station side antenna from described communication terminal; From described a plurality of base station side antennas, select to be used for the step of the base station side antenna more than 1 of the transmission of signal according to described feedback signal; Step with selected base station side antenna transmission signal more than 1.

According to another aspect of the present invention, provide the communication means of base station apparatus, it is at the base station apparatus with a plurality of base station side antennas and have between the communication terminal of a plurality of end side antennas and carry out radio communication; May further comprise the steps: the step that the feedback signal of the selection of relevant described base station side antenna is received with described base station side antenna from described communication terminal; From described a plurality of base station side antennas, select to be used to send the step of the base station side antenna more than 1 of signal according to described feedback signal; Step with selected base station side antenna transmission signal more than 1.

According to another aspect of the present invention, provide wireless communication system, at base station apparatus with have between the communication terminal of the end side antenna more than 1 and carry out radio communication with a plurality of base station side antennas; Described base station apparatus receives with described base station side antenna from the feedback signal of described communication terminal to the selection of relevant described base station side antenna, from described a plurality of base station side antennas, select to be used for the base station side antenna more than 1 of the transmission of signal according to described feedback signal, with selected base station side antenna transmission signal more than 1; Described communication terminal uses described end side antenna to receive signal from described base station apparatus, with described feedback signal with described end side antenna transmission.

According to another aspect of the present invention, provide wireless communication system, at base station apparatus with have between the communication terminal of a plurality of end side antennas and carry out radio communication with a plurality of base station side antennas; Described base station apparatus receives with described base station side antenna from the feedback signal of described communication terminal to the selection of relevant described base station side antenna, from described a plurality of base station side antennas, select to be used for the base station side antenna more than 1 of the transmission of signal according to described feedback signal, with selected base station side antenna transmission signal more than 1; Described communication terminal uses described a plurality of end side antenna to receive signal from described base station apparatus, with described feedback signal with described end side antenna transmission.

According to another aspect of the present invention, provide a kind of and communication terminal to carry out the communication means of the base station of radio communication, described radio communication base station has a plurality of antennas, described communication means comprises: receiving step receives the 1st information code element of the received electric field strength of representing entire system and the 2nd information code element of expression average effective received electric field strength from described communication terminal; Controlled step is according to the received electric field strength and the average effective received electric field strength decision parameter of described entire system; The signal processing step uses the parameter that is determined to send Signal Processing; And forwarding step, with treated transmission signal from described a plurality of antenna transmission.

According to another aspect of the present invention, provide a kind of and communication terminal to carry out the communication means of the base station of radio communication, described radio communication base station has a plurality of antennas, described communication means comprises: receiving step receives the 1st information code element of the received electric field strength of representing entire system and the 2nd information code element of expression average effective received electric field strength from described communication terminal; Select step,, from described a plurality of antennas, select to be used to send the transmitting antenna of signal according to the received electric field strength and the average effective received electric field strength of described entire system; And forwarding step, send described transmission signal with selected transmitting antenna.

According to another aspect of the present invention, provide a kind of and communication terminal to carry out the base station apparatus of radio communication, described base station apparatus comprises: a plurality of reception antennas receive the 1st information code element of the received electric field strength of representing entire system and the 2nd information code element of expression average effective received electric field strength from described communication terminal; Control unit is according to the received electric field strength and the average effective received electric field strength decision parameter of described entire system; Signal processing unit uses the parameter that is determined to send Signal Processing; And transmitting element, treated transmission signal is sent.

According to another aspect of the present invention, provide a kind of and communication terminal to carry out the base station apparatus of radio communication, described radio communication base station device comprises: a plurality of reception antennas receive the 1st information code element of the received electric field strength of representing entire system and the 2nd information code element of expression average effective received electric field strength from described communication terminal; Selected cell according to the received electric field strength and the average effective received electric field strength of described entire system, selects to be used to send the transmitting antenna of signal from a plurality of transmitting antennas; And a plurality of transmitting antennas, use the described transmission signal of the antenna transmission of from described a plurality of transmitting antennas, selecting.

According to another aspect of the present invention, provide a kind of communication terminal and base station apparatus to carry out the wireless communication system of radio communication, described base station apparatus comprises: a plurality of base station apparatus side antennas, receive the 1st information code element and the 2nd information code element of representing the average effective received electric field strength of the received electric field strength of expression entire system from described communication terminal, and treated transmission signal is sent; Control unit is according to the received electric field strength and the average effective received electric field strength decision parameter of described entire system; Signal processing unit uses the parameter that is determined to send Signal Processing; Described communication terminal comprises: a plurality of communication terminal side antennas, it receives the transmission signal next by described a plurality of base station apparatus side antenna transmission, and sends the 1st information code element of the received electric field strength of representing entire system and the 2nd information code element of expression average effective received electric field strength; Received electric field strength estimation portion, its transmission signal by described reception carries out frequency conversion and a plurality of baseband signals of obtaining, estimate the received electric field strength of each baseband signal, calculate the received electric field strength of described entire system from the received electric field strength of each baseband signal of described estimation; Effective received electric field strength calculating part calculates the average effective received electric field strength according to the received electric field strength of each baseband signal of described estimation with by the eigenvalue of the transmission signal estimated channel estimated matrix of described reception.

Description of drawings

Fig. 1 is the block diagram according to embodiments of the invention 1 signal base station equipment structure;

Fig. 2 is the block diagram according to embodiments of the invention 1 signal communication terminal device structure;

Fig. 3 is according to an example that sends the frame structure of signal in the embodiments of the invention 1 signal base station equipment;

The propagation channel of Fig. 4 for having illustrated according to embodiments of the invention 1 between base station equipment and the communication terminal device;

Fig. 5 is according to an example that sends the frame structure of signal in the embodiments of the invention 1 signal communication terminal device;

Fig. 6 lexical or textual analysis the form of being stored in the modulation system control assembly internal memory according to embodiments of the invention 1 base station equipment;

Fig. 7 is the internal structure block diagram according to modulation processing section in the S/P parts of embodiments of the invention 1 explanation base station equipment;

Fig. 8 is the block diagram according to embodiments of the invention 2 signal base station equipment structures;

Fig. 9 is the block diagram according to embodiments of the invention 2 signal communication terminal device structures;

Figure 10 is the block diagram according to embodiments of the invention 3 signal base station equipment structures;

Figure 11 is the block diagram according to embodiments of the invention 4 signal base station equipment structures;

Figure 12 is the block diagram according to embodiments of the invention 5 signal base station equipment structures;

Figure 13 is the block diagram according to embodiments of the invention 6 signal base station equipment structures;

Figure 14 is the block diagram according to embodiments of the invention 7 signal base station equipment structures;

Figure 15 is according to an example that sends the frame structure of signal in the embodiments of the invention 7 signal base station equipments;

Figure 16 has illustrated to send an example of each set of symbols structure of signal in Figure 15;

Figure 17 is the block diagram according to embodiments of the invention 8 signal base station equipment structures;

Figure 18 is the block diagram according to embodiments of the invention 9 signal base station equipment structures;

Figure 19 has illustrated an example of in embodiment 9 space-time coding method;

Figure 20 has illustrated to issue in the situation of encoding as shown in figure 19 an example of the frame structure of feed signals;

Figure 21 has illustrated in embodiment 9 to adopt an example of space-time coding method under the situation of 4 transmitting antennas;

Figure 22 has illustrated to issue in the situation of encoding as shown in figure 21 an example of the frame structure of feed signals;

Figure 23 has illustrated to adopt in embodiment 94 transmitting antennas to carry out an example of the frame structure of base station equipment transmission signal under the space-frequency coding method situation;

Figure 24 has illustrated in embodiment 9 to adopt 4 transmitting antennas to carry out the example that base station equipment under the method situation of space-time frequency coding sends the frame structure of signal;

Figure 25 has illustrated in embodiment 9 to adopt 4 transmitting antennas to carry out the example that base station equipment under the method situation of Space Time Coding sends the frame structure of signal;

Figure 26 has illustrated in embodiment 9 to adopt 4 transmitting antennas to carry out the example that base station equipment under the method situation of space-frequency coding sends the frame structure of signal;

Figure 27 has illustrated in embodiment 9 to adopt 4 transmitting antennas to carry out the example that base station equipment under the method situation of space-time frequency coding sends the frame structure of signal;

Figure 28 has illustrated to send in the base station equipment example of signal frame structure in embodiment 9;

Figure 29 is the block diagram according to embodiments of the invention 10 signal base station equipment structures;

Figure 30 has illustrated the relation between received electric field strength and the rank;

Figure 31 is the block diagram according to embodiments of the invention 11 signal base station equipment structures;

Figure 32 is according to an example that sends the frame structure of signal in the embodiments of the invention 11 signal base station equipments;

Figure 33 is according to an example that sends the frame structure of signal in the embodiments of the invention 11 signal communication terminal devices;

Figure 34 is according to an example that sends the frame structure of signal in the embodiments of the invention 11 signal base station equipments;

Figure 35 is according to another example that sends the frame structure of signal in the embodiments of the invention 11 signal base station equipments;

Figure 36 is the block diagram according to embodiments of the invention 12 signal base station equipment structures;

Figure 37 is the block diagram according to embodiments of the invention 13 signal transmitting apparatus structures;

Figure 38 is the block diagram according to embodiments of the invention 13 signal receiving equipment structures;

Figure 39 is the block diagram according to embodiments of the invention 14 signal transmitting apparatus structures;

Figure 40 is the block diagram according to embodiments of the invention 14 signal receiving equipment structures;

Figure 41 is the block diagram according to embodiments of the invention 15 signal receiving equipment structures;

Figure 42 is the block diagram according to embodiments of the invention 16 signal receiving equipment structures;

Figure 43 is the block diagram according to embodiments of the invention 17 signal base station equipment structures;

Figure 44 is the block diagram according to embodiments of the invention 18 signal base station equipment structures;

Embodiment

Each embodiment of the present invention will carry out following specifying with reference to accompanying drawing.Point out in addition, below each embodiment will illustrate that all base station equipment utilizes MIMO to send the situation that signal, communication terminal device utilize the MIMO received signal.

In addition, among each embodiment, OFDM (OFDM) system illustrates that as an example of multicarrier system CDMA (code division multiple access access) system illustrates as an example of single-carrier system below.

(embodiment 1)

Embodiment 1 has described the situation of utilizing MIMO in multi-carrier communication, and modulation system is controlled based on received electric field strength and effective received electric field strength of entire system.

Fig. 1 is the block diagram according to embodiment 1 signal base station equipment structure, in Fig. 1, base station equipment 100 comprises that at the sending part branch frame forms parts 101-1 and 101-2, serial/parallel (hereinafter to be referred as " S/P ") parts 102-1 and 102-2, inverse discrete Fourier transform (hereinafter to be referred as " IDFT ") parts 103-1 and 103-2, radio-frequency unit 104-1 and 114-2 and transmitting antenna 105-1 and 105-2.In addition, base station equipment 100 comprises reception antenna 151, radio-frequency unit 152, demodulation parts 153, separating component 154 and modulation system control assembly 155 at receiving unit.

Frame forms parts 101-1 and 101-2 receives the transmission numerical data separately as input, and numerical data is inserted channel estimation symbols and the generation of protection code element sends digital signal to sending, and exports this signal respectively to S/P parts 102-1 or 102-2.

In addition, channel estimation symbols be estimated time synchronously, Frequency Synchronization and because the code element of the distortion that channel fluctuation causes, be equivalent to known symbols, for example pilot frequency code element, unique word (word) and preamble etc., and be suitable for the modulation signal of BPSK (binary phase shift keying).In addition, in the protection code element, can insert zero symbol usually.

Input sends digital signal to S/P parts 102-1, carries out serial/parallel conversion process, further realizes the Adaptive Modulation processing according to the indication from modulation system control assembly 155, and parallel modulation signal is outputed to IDFT parts 103-1.Input sends digital signal to S/P parts 102-2, carries out serial/parallel conversion process, further realizes the Adaptive Modulation processing according to the indication from modulation system control assembly 155, and parallel modulation signal is outputed to IDFT parts 103-2.In addition, can specify below the Adaptive Modulation among S/P parts 102-1 and the 102-2 is handled.

To the parallel modulation signal of IDFT parts 103-1 input, this signal is carried out IDFT handle generation transmission baseband signal, export this signal to radio-frequency unit 104-1.To the parallel modulation signal of IDFT parts 103-2 input, this signal is carried out IDFT handle generation transmission baseband signal, export this signal to radio-frequency unit 104-2.Usually utilize the processing of IFFT (contrary Fourier transform) as IDFT.

Radio-frequency unit 104-1 input is sent baseband signal, and this baseband signal of up-conversion generates and sends signal (below be called " sending signal A "), sends this radio signal from transmitting antenna 105-1.Radio-frequency unit 104-2 input is sent baseband signal, change this baseband signal and generate and send signal (below be called " sending signal B "), send this radio signal from transmitting antenna 105-2.

The signal that 152 inputs are received from reception antenna 151 to radio-frequency unit, this signal of down-conversion generates receiving baseband signal, outputs results to demodulation parts 153.

To demodulation parts 153 input receiving baseband signals, this signal of demodulation generates receiving digital signals, outputs results to separating component 154.

Separating component 154 is separated into the information code element (hereinafter referred to as " first information code element ") of data symbols (receiving digital data), expression entire system received electric field strength and another information code element (hereinafter referred to as " second information code element ") of expression average effective received electric field strength with receiving digital signals, and exports first and second information code elements to modulation system control assembly 155.

To modulation system control assembly 155 input first and second information code elements, the received electric field strength of reading system integral body from first information code element further reads the value of average effective received electric field strength from second information code element.Then, modulation system control assembly 155 determines to send the modulation system of signal based on these values, and will indicate the control signal (hereinafter referred to as " modulation system index signal ") of determined modulation system to output to S/P parts 102-1 and 102-2.In addition, can specify below the processing procedure that modulation system is determined in modulation system control assembly 155.

Above-mentioned is explanation according to each parts of present embodiment base station equipment 100.

Next, with reference to the block diagram of Fig. 2, the structure of carrying out the communication terminal device of radio communication according to present embodiment and base station equipment shown in Figure 1 will be described as follows.In Fig. 2, communication terminal device 200 comprises reception antenna 201-1 and 201-2, radio-frequency unit 202-1 and 202-2, DFT parts 203-1 and 203-2 at receiving terminal, and data separating parts 204-1 and 204-2, estimation unit 205-1 are to 205-4 and Signal Processing Element 206.In addition, communication terminal device 200 comprises that at the sending part branch eigenvalue calculation parts 251, electric field strength estimation section 252, effective electric-field intensity calculating unit 253, frame form parts 254, modulating part 255, radio-frequency unit 256 and transmitting antenna 257.

The signal that input is received from reception antenna 201-1 to radio-frequency unit 202-1, this signal of down-conversion generates receiving baseband signal, and the result is outputed to DFT parts 203-1.The signal that input is received from reception antenna 201-2 to radio-frequency unit 202-2, this signal of down-conversion generates receiving baseband signal, and the result is outputed to DFT parts 203-2.

To DFT parts 203-1 input receiving baseband signal, this this signal is carried out DFT handle and output to data separating parts 204-1 and electric field strength estimation section 252.To DFT parts 203-2 input receiving baseband signal, this this signal is carried out DFT handle and output to data separating parts 204-2 and electric field strength estimation section 252.In addition, utilize the processing of FFT (fast fourier transform) usually as DFT.

Data separating parts 204-1 will be separated into the channel estimation symbols that sends signal A, channel estimation symbols and the data symbols that sends signal B through the receiving baseband signal that DFT handles, with the channel estimation symbols that sends signal A output to estimation unit 205-1, the channel estimation symbols that will send signal B outputs to estimation unit 205-2, and further data symbols outputed to Signal Processing Element 206.Data separating parts 204-2 will be separated into the channel estimation symbols that sends signal A, channel estimation symbols and the data symbols that sends signal B through the receiving baseband signal that DFT handles, to send signal A channel estimation symbols and output to estimation unit 205-3, will send signal B channel estimation symbols and output to estimation unit 205-4, and further data symbols be outputed to Signal Processing Element 206.

The channel estimation symbols of the transmission signal A that estimation unit 205-1 input is received from reception antenna 201-1, deadline synchronously, Frequency Synchronization and owing to send the processing (hereinafter referred to as " channel estimating ") that the channel fluctuation of signal A causes the various estimations of distortion, the channel estimation value of output expression result is to Signal Processing Element 206 and eigenvalue calculation parts 251.Estimation unit 205-2 input from the transmission signal B channel estimation symbols that reception antenna 201-1 is received, is finished the channel estimating that sends signal B, and the delivery channel estimated value is to Signal Processing Element 206 and eigenvalue calculation parts 251.

The letter of the transmission signal A that estimation unit 205-3 input is received from antenna 201-2 is finished the channel estimating that sends signal A to estimating code element, and the delivery channel estimated value is to Signal Processing Element 206 and eigenvalue calculation parts 251.The letter of the transmission signal B that estimation unit 205-4 input is received by antenna 201-2 is finished the channel estimating that sends signal B to estimating code element, and the delivery channel estimated value arrives Signal Processing Element 206 and eigenvalue calculation parts 251.

Signal Processing Element 206 utilizes channel estimation value demodulating data code element, generates receiving digital data.As an example of demodulation method, can utilize the channel matrix that comprises channel estimation value the matrix that comprises data symbols is carried out inverse matrix the processing computing method and carry out method of MLD (Maximum Likelihood Detection) etc.

251 inputs send the channel estimation value of signal A and B to the eigenvalue calculation parts, calculate the characteristic value that is equivalent to form the channel estimating value matrix, and output characteristic value is to effective electric-field intensity calculating unit 253.In addition, as the method for computation of characteristic values, known for example Jascobi, Givens, Householder, QR algorithm, QL algorithm, QL algorithm and inverse iteration (inverse iteration) with implicit displacement (implicit shift).Also adopted similar methods among each embodiment below.

The receiving baseband signal that 252 inputs are handled through DFT to the electric field strength estimation section, estimate to receive the intensity of electric field, this intensity be each receiving baseband signal amplitude square, and estimated received electric field strength averaged mutually, try to achieve the received electric field strength of entire system.The received electric field strength that 252 outputs of electric field strength estimation section are equivalent to each receiving baseband signal is to effective electric-field intensity calculating unit 253, and the received electric field strength of output system integral body forms parts 254 to frame.

253 inputs are equivalent to the received electric field strength and the characteristic value of each receiving baseband signal to the effective electric-field intensity calculating unit, multiply by each received electric field strength with the minimum power of characteristic value and obtain effective received electric field strength, effective received electric field strength is averaged acquisition average effective received electric field strength, and output average effective received electric field strength is to forming parts 254 to frame.The value of characteristic value minimum power is to be used for determining BER (bit error rate) characteristic of entire system and the principal element of PER (Packet Error Ratio).

Frame is formed received electric field strength and the average effective received electric field strength that parts 254 inputs send numerical data, entire system, generate the first information code element of expression entire system received electric field strength and second information code element of expression average effective received electric field strength.Then, frame forms parts 254 first and second information code elements is inserted into generation transmission digital signal in the transmission numerical data, and the result is outputed to modulating part 255.

255 inputs send numerical data to modulating part, signal is modulated to generate send baseband signal, and this signal is outputed to radio-frequency unit 256.

256 inputs send baseband signal to radio-frequency unit, and this signal of up-conversion generates and sends signal, sends this radio signal from transmitting antenna 257.

Be explanation as mentioned above according to each parts of this enforcement communication terminal device 200.

Fig. 3 is that in Fig. 3, in sending signal A, frame comprises channel estimation symbols 301, protection code element 302 and data symbols 303 successively according to an example that sends the frame structure of signal in the embodiments of the invention 1 signal base station equipment.In sending signal B, frame comprises protection code element 351, channel estimation symbols 352 and data symbols 353 successively.Send signal A and B initial identical timing, channel estimation symbols 352 in time the mutual overlapping of the protection code element 302 of insertion and 351 of being of frame separately for preventing to send the channel estimation symbols 301 of signal A and sending signal B.The result makes that channel estimation symbols 301 and 352 is independently of one another in time each other.

Fig. 4 has illustrated according to the propagation channel between present embodiment base station equipment and the communication terminal device, as shown in Figure 4, sends signal A (Ta (t)) and sends from transmitting antenna 105-1, sends from transmitting antenna 105-2 and send signal B (Tb (t)).Then, reception antenna 201-1 receives the transmission signal A of experience channel variation h11 (t) and the combined signal (R1 (t)) of the transmission signal B of experience channel variation h12 (t).Reception antenna 201-2 receives the transmission signal A of experience channel variation h21 (t) and experiences the combined signal (R2 (t)) of the transmission signal B of channel variation h22 (t).As a result, the matrix of formula (1) is set up as follows.

$\left(\begin{array}{c}R1\left(t\right)\\ R2\left(t\right)\end{array}\right)=\left(\begin{array}{cc}h11\left(t\right)& h12\left(t\right)\\ h21\left(t\right)& h22\left(t\right)\end{array}\right)\left(\begin{array}{c}\mathrm{Ta}\left(t\right)\\ \mathrm{Tb}\left(t\right)\end{array}\right)...\left(1\right)$

The matrix that comprises h11 (t), h12 (t), h21 (t) and h22 (t) in the formula (1) is called channel matrix.The characteristic value that eigenvalue calculation parts 251 calculate corresponding to formula (1) channel matrix.In addition, under the situation of n transmitting antenna and n reception antenna, channel matrix is n * n matrix.

Fig. 5 sends an example of the structure of signal frame according to the present embodiment communication terminal device for explanation.In Fig. 5, in sending signal, frame is made of first information code element 501, second information code element 502 and data symbols 503 successively.

The processing that modulation system in the modulation system control assembly 155 is judged specifies as follows with reference to Fig. 6.Fig. 6 has illustrated the table that is stored in modulation system control assembly 155 internal memories.

Difference X between the received electric field strength of modulation system control assembly 155 computing system integral body and the average effective electric-field intensity, and, from table as shown in Figure 6, determine optimum modulation system based on the magnitude relationship between difference X and threshold value TH1 and the TH2.For example, surpass or equal threshold value TH1 and less than threshold value TH2, modulation system control assembly 155 judges that the QPSK modulation is optimum as difference X.Then, modulation system control assembly 155 output modulation system index signals are to S/P parts 102-1 and 102-2.

Because effectively received electric field strength is the received electric field strength of expression based on the relativeness of each element between channel matrix element, as long as so carry out handling based on the Adaptive Modulation of effective received electric field strength, in the time of just can realizing that even the received electric field strength of a certain channel is more much bigger than other channels, number of modulation levels can not increase yet, and can make to improve the quality of reception with lower received electric field strength in most channels.

The processing of Adaptive Modulation specifies as follows with reference to Fig. 7 in S/P parts 102-1 and 102-2.Fig. 7 has illustrated the internal structure of the modulation processing section of S/P parts 102-1 and 102-2.

The inside of S/P parts 102-1 and 102-2 has alternative pack 701 and 705, BPSK modulating part 702, QPSK modulating part 703 and 16QAM modulating part 704 separately.

According to the index signal of modulation system, alternative pack 701 will send digital signal and output in BPSK modulating part 702, QPSK modulating part 703 or the 16QAM modulating part 704 from modulation system control assembly 155.

702 pairs of BPSK modulating parts send digital signal and carry out BPSK (binary phase shift keying) modulation, and the output modulation signal is to alternative pack 705.703 pairs of QPSK modulating parts send digital signal and carry out QPSK (quaternary phase-shift keying) modulation, and the output modulation signal is to alternative pack 705.704 pairs of 16QAM modulating parts send digital signal and carry out 16QAM (16 system amplitude modulation(PAM)) modulation, and the output modulation signal is to alternative pack 705.

Alternative pack 705 output modulation signals are to IDFT parts 103-1 and 103-2, and this modulation signal is the signal of exporting according to by the indicated optimal modulation mode of modulation system control assembly 155, from BPSK modulating part 702 or QPSK modulating part 703 or 16QAM modulating part 704.

Therefore, all utilize in the system of many antennas in transmission and reception, by based on entire system received electric field strength and effective received electric field strength control modulation system, make it can under the situation of the correlation of considering interchannel, realize control, and so can improve the quality of reception.

(embodiment 2)

Embodiment 2 has illustrated the situation of the single carrier communication that utilizes MIMO, and modulation system is controlled based on entire system received electric field strength and effective received electric field strength.

Fig. 8 is the block diagram according to present embodiment 2 signal base station equipment structures.In addition, in base station equipment 800 as shown in Figure 8, distribute the Reference numeral identical, omit description herein with Fig. 1 with structure member common in the base station equipment 100 shown in Figure 1.

Base station equipment 800 as shown in Figure 8 is except removing S/P parts 102-1 and 102-2 and IDFT parts 103-1 and 103-2 and increase modulating part 801-1 and 801-2 and spread spectrum parts 802-1 and the 802-2, has identical structure with as shown in Figure 1 base station equipment 100.

Frame formation parts 101-1 and 102-2 are imported the input of transmission numerical data as it separately, channel estimation symbols and protection code element are inserted into generation transmission digital signal in the transmission numerical data, export this signal respectively to modulating part 801-1 or 802-2

To modulation system control assembly 155 input first and second information code elements, from the first information code element received electric field strength of reading system integral body, from second information code element, read the value of average effective received electric field strength.Then, modulation system control assembly 155 sends the modulation system of signal based on the value decision of being read, and will indicate the modulation system index signal of the modulation system that is determined to output to modulating part 801-1 and 801-2.

Input sends digital signal to modulating part 801-1, and handles according to carry out Adaptive Modulation according to the indication of modulation system control assembly 155, and the output modulation signal is to spread spectrum parts 802-1.Input sends digital signal to modulating part 801-2, and carries out Adaptive Modulation according to the indication of modulation system control assembly 155 and handle, and the output modulation signal is to spread spectrum parts 802-2.

Spread spectrum parts 802-1 input modulating signal is carried out spread processing, and the output spread-spectrum signal is to radio-frequency unit 104-1.Spread spectrum parts 802-2 input modulating signal is carried out spread processing, and the output spread-spectrum signal is to radio-frequency unit 104-2.

To radio-frequency unit 104-1 input spread-spectrum signal, this signal of up-conversion generates and sends signal A, from transmitting antenna 105-1 this radio signal is sent.To radio-frequency unit 104-2 input spread-spectrum signal, this signal of up-conversion generates and sends signal B, from transmitting antenna 105-2 this radio signal is sent.

Fig. 9 is the block diagram according to illustrated embodiment 2 communication terminal device structures.In addition, in communication terminal device 900 as shown in Figure 9, the structure member common with communication terminal device shown in Figure 2 200 distributes the Reference numeral identical with Fig. 2, omits description herein.

Communication terminal device 900 as shown in Figure 9 has identical structure except DFE parts 203-1 being removed with 203-2 and having increased despreading parts 801-1 and the 802-2 with as shown in Figure 2 communication terminal device.

The signal that input is received by reception antenna 201-1 to radio-frequency unit 202-1, this signal of down-conversion generates receiving baseband signal, and outputs results to despreading parts 901-1.The signal that input is received by reception antenna 201-2 to radio-frequency unit 202-2, this signal of down-conversion generates receiving baseband signal, and outputs results to despreading parts 901-2.

Despreading parts 901-1 input receiving baseband signal is carried out despreading handle, and output results to data separating parts 204-1 and electric field strength estimation section 252.Despreading parts 901-1 input receiving baseband signal is carried out despreading handle, and output results to data separating parts 204-2 and electric field strength estimation section 252.

The data separating parts 204-1 receiving baseband signal of despreading is separated into the channel estimation symbols that sends signal A, channel estimation symbols and the data symbols that sends signal B, the channel estimation symbols that sends signal A is outputed to estimation unit 205-1, the channel estimation symbols that sends signal B is outputed to estimation unit 205-2, and data symbols is outputed to Signal Processing Element 206.The data separating parts 204-2 receiving baseband signal of despreading is separated into the channel estimation symbols that sends signal A, channel estimation symbols and the data symbols that sends signal B, the channel estimation symbols that sends signal A is outputed to estimation unit 205-3, the channel estimation symbols that sends signal B is outputed to estimation unit 205-4, and data symbols is further outputed to Signal Processing Element 206.

Electric field strength estimation section 252 is imported the receiving baseband signal of despreading, estimates received electric field strength, its be each receiving baseband signal amplitude square, by received electric field strength is averaged, try to achieve the received electric field strength of entire system.Electric field strength estimation section 252 will output to effective electric-field intensity calculating unit 253 corresponding to the received electric field strength of each receiving baseband signal, and the received electric field strength of entire system is outputed to frame formation parts 254.

Therefore, all utilize in the system of many antennas in transmission and reception, by received electric field strength and effective electric-field intensity control modulation system based on entire system, so that can under the situation of the correlation of having considered interchannel, realize control, and therefore can improve the quality of reception.

(embodiment 3)

Embodiment 3 explanation is in the situation of the multi-carrier communication that utilizes MIMO, is switched transmitting antenna based on the received electric field strength and the effective electric-field intensity of entire system.In addition, the structure of present embodiment communication terminal device is identical with the communication terminal device 200 of the Fig. 2 described in the embodiment 1, and therefore explanation herein is omitted.

Figure 10 is the block diagram according to embodiment 3 signal base station equipment structures.In addition, in base station equipment 1000 as shown in the figure,, omit herein and describe giving the Reference numeral identical with Fig. 1 with the common structure member of base station equipment shown in Figure 1 100.

Base station equipment 1000 as shown in figure 10 has identical structure except modulation system control assembly 155 being removed and having increased antenna control assembly 1051, antenna alternative pack 1001 and the transmitting antenna 105-3 with as shown in Figure 1 base station equipment.

Separating component 154 outputs first and second information code elements are to antenna control assembly 1051.

Antenna control assembly 1051 receives first and second information code elements, from the first information code element received electric field strength of reading system integral body, from second information code element, further read the value of average effective received electric field strength.Then, antenna control assembly 1051 judges whether switch transmitting antenna based on the value that is read, and the decision transmitting antenna.Specifically, the received electric field strength of antenna control assembly 1051 computing system integral body and the difference X between the average effective received electric field strength do not switch transmitting antenna when difference X is judged to be during less than predetermined threshold, determine to switch transmitting antenna during more than or equal to predetermined threshold as difference X.Then, the control signal (hereinafter referred to as " transmitting antenna index signal ") of the determined transmitting antenna of antenna control assembly 1051 output indications is to antenna alternative pack 1001.

Input sends baseband signal to radio-frequency unit 104-1, and the up-conversion baseband signal generates and sends signal A, exports this signal to antenna alternative pack 1001.Input sends baseband signal to radio-frequency unit 104-2, and up-conversion is changed baseband signal and generated transmission signal B, exports this signal to antenna alternative pack 1001.

Antenna alternative pack 1001 is according to the transmitting antenna index signal from 1051 outputs of antenna control assembly, select two different antennas respectively as the transmitting antenna that sends signal A and B from transmitting antenna 105-1 to 105-3, and utilize selected transmitting antenna will send signal A and B sends by radio communication.

Therefore, by all utilizing in the system of many antennas in transmission and reception, received electric field strength and effective electric-field intensity based on entire system are selected transmitting antenna, can make and realize control under the situation of the correlation of considering interchannel, and therefore can improve the quality of reception.

In addition, in the present embodiment, beginning a kind of method of the moment of communicating by letter as initialization operation, base station equipment is selected the group of the transmitting antenna that minimizes difference X to each transmitting antenna group (105-1 and 105-2), the received electric field strength of (105-2 and 105-3) and (105-3 and 105-1) computing system integral body and the difference X between the average effective received electric field strength.As a kind of simpler method, consider to utilize the be separated by way of two antennas farthest of distance between the antenna element.This is because standoff distance then Antenna Correlation far away more between the common antenna and channel relevancy are just low more, therefore is fit to be applied to the mimo system of present embodiment.

(embodiment 4)

Embodiment 4 is described in the carrier wave communication system that utilizes MIMO, the situation that transmitting antenna switches based on the received electric field strength and the effective electric-field intensity of entire system, in addition, the structure of communication terminal device is identical in as shown in Figure 9 communication terminal device in embodiment 2 in the present embodiment, therefore omits herein and describes.

Figure 11 is the block diagram according to embodiment 4 signal base station equipment structures.In addition, in base station equipment 1100 as shown in figure 11, the structure member common with base station equipment shown in Figure 8 800 distributed the Reference numeral identical with Fig. 8, omits herein and describes.

Base station equipment 1100 as shown in figure 11 has identical structure except modulation system control assembly 155 being removed and having been increased antenna control assembly 1151, antenna alternative pack 1101 and the transmitting antenna 105-3 with as shown in Figure 8 base station equipment 800.

Separating component 154 outputs first and second information code elements are to antenna control assembly 1151.

To antenna control assembly 1151 input first and second information code elements, from the first information code element received electric field strength of reading system integral body, from second information code element, read the value of average effective received electric field strength.Then, antenna control assembly 1151 judges whether switch transmitting antenna based on the value that is read, and the decision transmitting antenna.More particularly, the received electric field strength of antenna control assembly 1151 computing system integral body and the difference X between the average effective received electric field strength, do not switch transmitting antenna when difference X judges during less than predetermined threshold, switch transmitting antenna when difference X judges during more than or equal to predetermined threshold.Then, 1151 outputs of antenna control assembly indicate the transmitting antenna index signal of the transmitting antenna that is determined to antenna alternative pack 1101.

Input sends baseband signal to radio-frequency unit 104-1, and the up-conversion baseband signal generates and sends signal A, exports this signal to antenna alternative pack 1101.Input sends baseband signal to radio-frequency unit 104-2, and up-conversion is changed baseband signal and generated transmission signal B, exports this signal to antenna alternative pack 1101.

According to transmitting antenna index signal from 1151 outputs of antenna control assembly, antenna alternative pack 1101 selects two different antennas respectively as the transmitting antenna that sends signal A and B from transmitting antenna 105-1 to 105-3, and utilizes selected transmitting antenna will send signal A and B sends by radio communication.

Therefore, all utilize in the system of many antennas in transmission and reception, received electric field strength and effective electric-field intensity based on entire system pass through to select transmitting antenna, can make and realize control under the situation of the correlation of considering interchannel, and so can improve the quality of reception.

(embodiment 5)

Embodiment 5 is described in the multi-carrier communications systems that utilizes MIMO, the situation that transmitted power changes based on the received electric field strength and the effective electric-field intensity of entire system, in addition, the structure of communication terminal device is identical in as shown in Figure 2 communication terminal device 200 in embodiment 1 in the present embodiment, therefore omits herein and describes.

Figure 12 is the block diagram according to embodiment 5 signal base station equipment structures.In addition, in base station equipment 1200 as shown in figure 12, give the Reference numeral identical, omit herein and describe with Fig. 1 with the structure member that base station equipment shown in Figure 1 100 is common.

Base station equipment 1200 as shown in figure 12 changes parts 1201-1 and the 1201-2 with as shown in Figure 1 base station equipment 100 and has identical structure except modulation system control assembly 155 being removed and being increased transmission power control parts 1251 and transmitted power.

Separating component 154 outputs first and second information code elements are to transmission power control parts 1251.

To transmission power control parts 1251 input first and second information code elements, from the first information code element received electric field strength of reading system integral body, from second information code element, read the value of average effective received electric field strength.Then, transmission power control parts 1251 are based on the value decision transmitted power that is read.In particular, the received electric field strength of transmission power control parts 1251 computing system integral body and the difference X between the average effective received electric field strength set higher transmitted power when difference is less.Then, transmission power control parts 1251 will indicate the control signal (hereinafter referred to as " transmitted power index signal ") of the transmitted power that is determined to output to transmitted power change parts 1201-1 and 1201-2.

Input sends baseband signal to radio-frequency unit 104-1, and the up-conversion baseband signal generates and sends signal A, exports this signal and changes parts 1201-1 to transmitted power.Input sends baseband signal to radio-frequency unit 104-2, and the up-conversion baseband signal generates and sends signal B, exports this signal and changes parts 1201-2 to transmitted power.

According to the transmitted power index signal from transmission power control parts 1251 output, transmitted power changes parts 1201-1 and changes the transmitted power that sends signal A, and will send signal A and send by radio communication with the transmitted power through change.According to the transmitted power index signal from transmission power control parts 1251 output, transmitted power changes parts 1201-2 and changes the transmitted power that sends signal B, and will send signal B and send by radio communication with the transmitted power through change.

Therefore, all utilize in the system of many antennas in transmission and reception, change transmitted power by received electric field strength and effective electric-field intensity, can make and under the situation of the correlation of considering interchannel, realize control, and therefore can improve the quality of reception based on entire system.

(embodiment 6)

Embodiment 6 has described the situation at the carrier wave communication system that utilizes MIMO, transmitted power changes based on the received electric field strength and the effective electric-field intensity of entire system, in addition, the structure of communication terminal device is identical with as shown in Figure 9 communication terminal device 900 in embodiment 2 in the present embodiment, therefore omits herein and describes.

Figure 13 is the block diagram according to embodiment 6 signal base station equipment structures.In addition, in base station equipment 1300 as shown in figure 13, the structure member common with base station equipment shown in Figure 8 800 distributed the Reference numeral identical with Fig. 8, omits herein and describes.

Base station equipment 1300 as shown in figure 13 changes parts 1301-1 and the 1301-2 with as shown in Figure 8 base station equipment 800 and has identical structure except modulation system control assembly 155 being removed and being increased transmission power control parts 1351 and transmitted power.

Separating component 154 outputs first and second information code elements are to transmission power control parts 1351.

To transmission power control parts 1351 input first and second information code elements, from the first information code element received electric field strength of reading system integral body, from second information code element, further read the value of average effective received electric field strength.Then, transmission power control parts 1351 are based on this value decision transmitted power.In particular, the received electric field strength of transmission power control parts 1351 computing system integral body and the difference X between the average effective received electric field strength set higher transmitted power when difference is less.Then, transmission power control parts 1351 output transmitted power index signals change parts 1301-1 and 1301-2 to transmitted power.

Input sends baseband signal to radio-frequency unit 104-1, and the up-conversion baseband signal generates and sends signal A, exports this signal and changes parts 1301-1 to transmitted power.Input sends baseband signal to radio-frequency unit 104-2, and the up-conversion baseband signal generates and sends signal B, exports this signal and changes parts 1301-2 to transmitted power.

According to the transmitted power index signal from transmission power control parts 1351 output, transmitted power changes parts 1301-1 and changes the transmitted power that sends signal A, and will send signal A and send by radio communication with the transmitted power through change.According to the transmitted power index signal from transmission power control parts 1351 output, transmitted power changes parts 1301-2 and changes the transmitted power that sends signal B, and will send signal B and send by radio communication with the transmitted power through change.

Therefore, all utilize in the system of many antennas in transmission and reception, change transmitted power by received electric field strength and effective electric-field intensity, can make and under the situation of the correlation of considering interchannel, realize control, and therefore can improve the quality of reception based on entire system.

(embodiment 7)

Embodiment 7 has described under the situation of the multi-carrier communications systems that utilizes MIMO, received electric field strength and effective electric-field intensity based on entire system change communication means, in addition, the structure of communication terminal device is identical with as shown in Figure 2 communication terminal device 200 in embodiment 1 in the present embodiment, therefore omits herein and describes.

Figure 14 is the block diagram according to embodiment 7 signal base station equipment structures.In addition, in base station equipment 1400 as shown in figure 14, the structure member common with base station equipment shown in Figure 1 100 distributed the reference number identical with 1, omits herein and describes.

Base station equipment 1400 as shown in figure 14 changes parts 1201-1 and 1201-2, antenna alternative pack 1001 and the transmitting antenna 105-3 with as shown in Figure 1 base station equipment 100 and has identical structure except modulation system control assembly 155 being removed and being increased communication means control assembly 1451, transmitted power.

Separating component 154 outputs first and second information code elements are to communication means control assembly 1451.

To communication means control assembly 1451 input first and second information code elements, from the first information code element received electric field strength of reading system integral body, from second information code element, further read the value of average effective received electric field strength.Then, communication means control assembly 1451 is based on this value decision modulation system, transmitted power and transmitting antenna.Communication means control assembly 1451 output modulation system index signals arrive antenna alternative pack 1001 to S/P parts 102-1 and 102-2, output transmitting antenna index signal, and output transmitted power index signal changes parts 1201-1 and 1201-2 to transmitted power.

S/P parts 102-1 receives and sends digital signal, carries out serial/parallel conversion process, and handles according to further doing Adaptive Modulation from the modulation system index signal of communication means control assembly 1451 outputs, exports modulated parallel signal to IDFT parts 103-1.S/P parts 102-2 receives and sends digital signal, carries out serial/parallel conversion process, and handles according to further doing Adaptive Modulation from the modulation system index signal of communication means control assembly 1451 outputs, exports modulated parallel signal to IDFT parts 103-2.

Input sends baseband signal to radio-frequency unit 104-1, and the up-conversion baseband signal generates and sends signal A, exports this signal and changes parts 1201-1 to transmitted power.Input sends baseband signal to radio-frequency unit 104-2, and the up-conversion baseband signal generates and sends signal B, exports this signal and changes parts 1201-2 to transmitted power.

According to the transmitted power index signal from communication means control assembly 1451 output, transmitted power changes parts 1201-1 and changes the transmitted power that sends signal A, and the transmission signal A that will change transmitted power outputs to antenna alternative pack 1001.According to the transmitted power index signal from communication means control assembly 1451 output, transmitted power changes parts 1201-2 and changes the transmitted power that sends signal B, and will change transmitted power and send signal B and output to antenna alternative pack 1001.

According to transmitting antenna index signal from 1451 outputs of communication means control assembly, antenna alternative pack 1001 selects two different antennas respectively as the transmitting antenna that sends signal A and B from transmitting antenna 105-1 to 105-3, and utilizes selected transmitting antenna will send signal A and B sends by radio communication.

Figure 15 is the transmission signal A of base station equipment and the frame configuration example of B in the explanation present embodiment, and each frame of transmission signal A and B all comprises the set of symbols based on time or frequency.

Figure 16 sends the structure example of each set of symbols of signal A and B in Figure 15 for explanation.Each set of symbols that sends signal A and B comprises channel estimation symbols 1601 and data symbols 1602.Data symbols 1602 also can be not have the protected mode of modulation signal and when modulating, can use the pattern of QPSK, 16QAM and 64QAM as modulation system.

In Figure 15, suppose in the time 1, send the set of symbols experience QPSK modulation of signal A and B, and send from transmitting antenna 105-1 and 105-2 respectively with predetermined transmitted power.

In this case, communication terminal device 200 calculates the received electric field strength of average effective received electric field strength and entire system from channel estimation symbols 1601 as shown in figure 16, and the value of being calculated is sent to base station equipment 1400.

Communication means control assembly 1451 in the base station equipment 1400 is based on the received electric field strength decision communication means (modulation system, transmitted power and transmitting antenna) of average effective electric field strength and entire system.

For example, suppose under the situation of time 1, exist almost little difference between the received electric field strength of entire system and the average effective received electric field strength, the received electric field strength of entire system is the received electric field strength that is suitable for the QPSK modulation, in this case, communication means control assembly 1451 is determined to increase the transmitted power that sends signal A and B, and does not change modulation system and transmitting antenna.

By this method, in the time 2, the set of symbols that sends signal A and B is modulated by QPSK, and with the transmitted power that is higher than 1 o'clock time they is sent from transmitting antenna 105-1 and 105-2 respectively.

Next suppose in the time 2; exist very big difference between the received electric field strength of entire system and the average effective received electric field strength; the received electric field strength of entire system is the received electric field strength that is suitable for the 16QAM modulation; in this case; it is 16QAM that communication means control assembly 1451 is established the modulation system that sends signal A; sending signal B increases for protection code element (not sending data symbols 1602), transmitted power, and transmitting antenna does not change.

In this way, in the time 3, the set of symbols that sends signal A is modulated by 16QAM, and sends from transmitting antenna 105-1 with the transmitted power that is higher than 2 o'clock time, has only the signal of transmission B channel estimation symbols to be sent out away from transmitting antenna 105-2 with the transmitted power that is higher than 2 o'clock time.In addition,, by from two original states that antenna transmission is gone out, change the signal that will increase number of modulation levels into and send, make it possible in reserve transport capacity, improve the quality of reception from single transmitting antenna in the time 3.

Suppose in the time 3; exist very big difference between the received electric field strength of entire system and the average effective received electric field strength; the received electric field strength of entire system is the received electric field strength that is suitable for the 64QAM modulation; in this case; the modulation system that 1451 decisions of communication means control assembly send signal A is 64QAM; send signal B and be the protection code element, transmitted power does not change, and sends signal A and B sends from transmitting antenna 105-1 and 105-3 respectively.Wherein by switching transmitting antenna, the value of matrix element will change in the formula (1), and characteristic value also changes thereupon, the possibility that makes that the average effective received electric field strength improves therefore occurs, therefore the quantity of multiplexing transmission signal can be increased, therefore data transmission rate can be improved.

In this way, in the time 4, the set of symbols that sends signal A is by 64QAM, and from transmitting antenna 105-1 with the time 3 identical transmitted power send, and have only the channel estimation symbols that sends signal B to send with the transmitted power identical with 3 o'clock time from transmitting antenna 105-3.

Suppose that in the time 4 exist very little difference between the average effective received electric field strength of entire system and the received electric field strength, the received electric field strength of entire system is the electric field strength that is suitable for 16QAM.In this case, communication means control assembly 1451 determine 16QAM for the modulation system that sends signal A and B, increase transmitted power, and decision sends signal A and B sends from transmitting antenna 105-1 and 105-3 respectively.

In this way, in the time 5, send the set of symbols experience 16QAM modulation of signal A and B, and send with the transmitted power that is higher than 4 o'clock time from transmitting antenna 105-1 and 105-3 respectively.

Therefore, all utilize in the system of many antennas in transmission and reception, change communication means by received electric field strength and effective received electric field strength, can make and under the situation of the correlation of considering interchannel, realize control, and so can improve the quality of reception based on entire system.

(embodiment 8)

Embodiment 8 has described under the situation of the carrier wave communication system that utilizes MIMO, communication means changes based on the received electric field strength and the effective electric-field intensity of entire system, in addition, the structure of communication terminal device is identical with as shown in Figure 2 communication terminal device 200 in embodiment 1 in the present embodiment, therefore omits herein and describes.

Figure 17 is the block diagram according to embodiment 8 signal base station equipment structures.In addition, in base station equipment 1700 as shown in figure 17, the structure member common with base station equipment shown in Figure 8 800 distributed the Reference numeral identical with Fig. 8, omits herein and describes.

Base station equipment 1700 as shown in figure 17 changes parts 1301-1 and 1301-2, antenna alternative pack 1101 and the transmitting antenna 105-3 with as shown in Figure 8 base station equipment 800 and has identical structure except modulation system control assembly 155 being removed and being increased communication means control assembly 1751, transmitted power.

Separating component 154 outputs first and second information code elements are to communication means control assembly 1751.

Communication means control assembly 1751 receives first and second information code elements, from the first information code element received electric field strength of reading system integral body, from second information code element, further read the value of average effective received electric field strength.Then, communication means control assembly 1751 is determined modulation system, transmitted power and transmitting antenna based on the value that is read.Communication means control assembly 1751 output modulation system index signals change parts 1301-1 and 1301-2 to antenna alternative pack 1101, output transmitted power index signal to transmitted power to modulating part 801-1 and 801-2, output transmitting antenna index signal.

Input sends digital signal to modulating part 801-1, and according to carrying out Adaptive Modulation from the modulation system index signal of communication means control assembly 1751 outputs, the output modulation signal is to spread spectrum parts 802-1.Input sends digital signal to modulating part 801-2, and according to carrying out Adaptive Modulation from the modulation system index signal of communication means control assembly 1751 outputs, the output modulation signal is to spread spectrum parts 802-2.

Input sends baseband signal to radio-frequency unit 104-1, and the up-conversion baseband signal generates and sends signal A, exports this signal and changes parts 1301-1 to transmitted power.Input sends baseband signal to radio-frequency unit 104-2, and the up-conversion baseband signal generates and sends signal B, exports this signal and changes parts 1301-2 to transmitted power.

According to the transmitted power index signal from communication means control assembly 1751 output, transmitted power changes parts 1301-1 and changes the transmitted power that sends signal A, and the transmission signal A that will change transmitted power outputs to antenna alternative pack 1101.According to the transmitted power index signal from communication means control assembly 1751 output, transmitted power changes parts 1301-2 and changes the transmitted power that sends signal B, and the transmission signal B that will change transmitted power outputs to antenna alternative pack 1101.

According to the transmitted power index signal from communication means control assembly 1751 output, transmitted power changes parts 1301-1 and changes the transmitted power that sends signal A, and the transmission signal A that will change transmitted power outputs to antenna alternative pack 1101.According to the transmitted power index signal from communication means control assembly 1751 output, transmitted power changes parts 1301-2 and changes the transmitted power that sends signal B, and the transmission signal B that will change transmitted power outputs to antenna alternative pack 1101.

According to transmitting antenna index signal from 1751 outputs of communication means control assembly, antenna alternative pack 1101 selects two different antennas respectively as the transmitting antenna that sends signal A and B from transmitting antenna 105-1 to 105-3, and utilizes selected transmitting antenna will send signal A and B sends by radio communication.

Therefore, all utilize in the system of many antennas in transmission and reception, change communication means by received electric field strength and effective electric-field intensity, can make and under the situation of the correlation of considering interchannel, realize control, and therefore can improve the quality of reception based on entire system.

(embodiment 9)

Embodiment 9 has described under the situation of multi-carrier communication, based on received electric field strength and effective received electric field strength of entire system, switches communicate by letter (hereinafter referred to as " code communication ") of MIMO communication and realization predictive encoding.Code communication has lower transmission rate than MIMO communication, but can obtain to send diversity gain under the situation that does not rely on transmission channel.Therefore, improved transmission quality.In addition, coding method in the present invention is not restricted, and coding can utilize Space Time Coding, space-frequency coding and space-time frequency coding.

Figure 18 is the block diagram according to embodiment 9 signal base station equipment structures, in addition, base station equipment 1800 as shown in figure 18, the structure member common with base station equipment shown in Figure 1 100 distributed the reference number identical with Fig. 1, omits herein and describes.

Base station equipment 1800 as shown in figure 18 has identical structure except modulation system control assembly 155 being removed and being increased coding method control assembly 1851 and the addressable part 1801 with as shown in Figure 1 base station equipment 100.

Separating component 154 outputs first and second information code elements are to coding method control assembly 1851.

To coding method control assembly 1851 input first and second information code elements, from the first information code element received electric field strength of reading system integral body, from second information code element, read the value of average effective received electric field strength.Then, whether coding method control assembly 1851 carries out MIMO communication or code communication based on the value decision of being read.Refer to more specifically, the received electric field strength of coding method control assembly 1851 computing system integral body and the difference between the average effective received electric field strength, and when difference X determines to utilize MIMO communication during less than predetermined threshold, when difference X during more than or equal to predetermined threshold decision utilize code communication.Then, coding method control assembly 1851 will indicate the control signal (hereinafter referred to as " communication means index signal ") of the communication means that is determined to output to addressable part 1801.

Each frame formation parts 101-1 and 101-2 are imported the transmission numerical data separately as input, insert channel estimation symbols and protect the code element generation to send digital signal, export this signal to addressable part 1801 to sending numerical data.

Input sends digital signals to addressable part 1801, when carrying out encoding process during for code communication from the communication means index signal of coding method control assembly 1851 outputs, the transmission digital signal of coding is outputed to S/P parts 102-1 and 102-2.In addition, addressable part 1801 receives and sends digital signal, does not carry out encoding process when the communication means index signal from 1851 outputs of coding method control assembly is MIMO communication, and output sends digital signal to S/P parts 102-1 and 102-2.

Figure 19 is the example of a Space Time Coding in the signal present embodiment.Wherein illustrated space-time coding method is document " Space-Time Block Codes from Orthogonal Designs ", IEEETRANSACTIONS OF INFORMATION THEORY, pp 1456-1467, vol.45, no.5, July1999 " described in.

Under the situation of Figure 19, base station equipment 1800 sends signal S at moment t from transmitting antenna 105-1 ₁And the signal S that sends from transmitting antenna 105-2 ₂, further send signal-S from transmitting antenna 105-1 at moment t+T ₂ ^*And the signal S that sends from transmitting antenna 105-2 ₁ ^*( ^*Refer to complex conjugate).

Figure 20 illustrates that base station equipment 1800 is carried out the frame configuration example that the coding situation issues feed signals as shown in figure 19.In addition, in Figure 20, the part identical with Fig. 3 has been assigned with the Reference numeral identical with Fig. 3, omits herein and describes.

In Figure 20, in sending signal A, each frame comprises channel estimation symbols 301, protection code element 302, code signal 2001 and code signal 2002 successively.Simultaneously, in sending signal B, each frame comprises protection code element 351, channel estimation symbols 352, code signal 2051 and code signal 2052 successively.

As supposition h ₁(t) be the signal S that sends signal A among Figure 20 ₁And signal-S ₂ ^*The channel variation of the transmission path that is experienced, h ₂(t) be the signal S that sends signal B among Figure 20 ₂With signal S ₁ ^*The channel variation of the transmission path that is experienced, communication terminal device are received in moment t by signal S ₁And S ₂The synthetic signal (R1) that obtains further is received in moment t+T by signal-S ₂ ^*And S ₁ ^*The synthetic signal (R2) that obtains.Formula below the result (2) is set up.

$\left(\begin{array}{c}R1\\ -\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="A200810182402E00671.png,A200810182402E00691.png"\; state="\{\{state\}\}">R</figure-callout>}{2}^{*}\end{array}\right)=\left(\begin{array}{cc}h1& h2\\ -{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="A200810182402E00671.png,A200810182402E00691.png"\; state="\{\{state\}\}">h</figure-callout>}2}^{*}& {\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="A200810182402E00761.png,A200810182402E00811.png"\; state="\{\{state\}\}">h</figure-callout>}1}^{*}\end{array}\right)\left(\begin{array}{c}S1\\ \mathrm{<figure-callout\; id="2"\; label="S"\; filenames="A200810182402E00671.png,A200810182402E00691.png"\; state="\{\{state\}\}">S</figure-callout>}2\end{array}\right)...\left(2\right)$

The communication terminal device of present embodiment and communication terminal device 200 as shown in Figure 2 are except having identical structure Signal Processing Element 206 contents processings.

When code communication, for example, the inverse matrix of channel matrix in Signal Processing Element 206 calculating formulas (2) in the communication terminal device multiplies each other and decodes and demodulation sends signal S by insert this inverse matrix respectively from the left side on the both sides of formula (2) ₁And S ₂

By encoding by base station signal and sending, orthogonal from the transmission signal phasor that transmitting antenna sends, so the signal that communication terminal device can demodulation receives under the situation that does not increase noise.

In addition, in the present embodiment, even in the moment of code communication, communication terminal device calculates the characteristic value corresponding to channel matrix in the formula (1), and the received electric field strength and the average effective received electric field strength of acquisition entire system send to base station equipment.

Figure 21 is an example of space-time coding method under four transmitting antenna situations of signal in the present embodiment.In addition, this space-time coding method is document " Space-Time Block Coding for WirelessCommunications:Performance Results ", IEEE JOURNAL ON SELECTED AREASIN COMMUNICATIONS, pp 451-460, vol.17, described in the no.3, March 1999.

Under the situation of Figure 21, it is 2101 that base station equipment sends sets of signals at moment t from each transmitting antenna, moment t+T, from each transmitting antenna send sets of signals be 2102, at moment t+2T, to send sets of signals from each transmitting antenna be 2103, and at moment t+3T, to send sets of signals from each transmitting antenna be 2104.

Figure 22 is the example that the explanation base station equipment sends signal frame structure under the situation that as shown in figure 21 coding method realizes.In addition, in Figure 22, the part identical with Fig. 3 has been assigned with the Reference numeral identical with Fig. 3, omits herein and describes.

In Figure 22, in sending signal A, each frame comprises channel estimation symbols 2201, protection code element 2201-1,2201-2 and 2201-3 successively, and code signal 2203-1,2203-2,2203-3 and 2203-4.In sending signal B, each frame comprises protection code element 2222-1, channel estimation symbols 2221, protection code element 2222-2,2222-3 and code signal 2223-1,2223-2,2223-3 and 2223-4 successively.In sending signal C, each frame comprises protection code element 2242-1 and 2242-2, channel estimation symbols 2241, protection code element 2242-3 and code signal 2243-1,2243-2,2243-3 and 2243-4 successively.In sending signal D, each frame comprises protection code element 2262-1,2262-2 and 2262-3, channel estimation symbols 2261 and code signal 2263-1,2263-2,2263-3 and 2263-4 successively.By sending such frame structure, mutually orthogonal each other from the transmission signal phasor of transmitting antenna output, communication terminal device can be under the situation that does not increase noise demodulated received signal.

Figure 23 realizes an example of explanation base station equipment transmission signal frame structure under the situation of space-frequency coding method for utilizing four antennas in the present embodiment.In Figure 22, signal is configured on the time-axis direction, and signal is configured on the frequency axis in Figure 23.Figure 24 realizes an example of explanation base station equipment transmission signal frame structure under the situation of space-time frequency coding method for utilizing four antennas in the present embodiment.

Figure 25 realizes an example of explanation base station equipment transmission signal frame structure under the situation of space-time coding method for utilizing four antennas in the present embodiment.Figure 26 realizes an example of explanation base station equipment transmission signal frame structure under the situation of space-frequency coding method for utilizing four antennas in the present embodiment.Figure 27 realizes an example of explanation base station equipment transmission signal frame structure under the space-time frequency coding method situation for utilizing four antennas in the present embodiment.

In the description of Figure 25 to 27, a1 sends the code signal of signal A to a4 for expression, and b1 represents to send the code signal of signal B to b4, and c1 represents to send the code signal of signal C to c4, and d1 represents to send the code signal of signal D to d4.

Under the situation of four transmitting antennas, base station equipment is based on the received electric field strength and the coding method of the selection of the difference X between the average effective received electric field strength shown in Figure 25 to 27 of entire system.

For example, when sending the subcarrier received electric field strength drop of signal A, send the quality of reception deterioration of signal A, simultaneously S among Figure 22 ₁, S ₂And S ₃The quality of reception deterioration also takes place, in order to address this problem, shown in Figure 23 and 26, on frequency axis, carry out coding.In this way, for example, even on subcarrier, during the received electric field strength drop,, so just can suppress S if send the not drop of received electric field strength of the subcarrier of a2, a3 and a4 at the transmission information a1 that sends signal A ₁, S ₂And S ₃The deterioration of the quality of reception.

When the multicarrier system utilized such as OFDM, shown in Figure 24 and 27, can carry out space-time frequency coding.Therefore can guarantee between the transmission signal phasor of reception antenna, to be quadrature or quasiorthogonal form that in order to ensure quadrature and quasiorthogonal property, preferred inhibition as far as possible sends the expansion of signal phasor on time shaft and frequency axis to improve the interchannel correlation.For example, only be configured on the time shaft when code element shown in Figure 22, sending signal phasor and on time shaft, expand, and only be configured on the frequency axis when code element as shown in Figure 23, send signal phasor and on frequency axis, expand, therefore be difficult to guarantee orthogonality and quasiorthogonal property like this.Therefore, in order to guarantee orthogonality and quasiorthogonal property greatly, as shown in figure 27, can on the T/F axle, encode.For example can set and switch based on two predetermined thresholdings.Therefore can guarantee S ₁, S ₂And S ₃The quality of reception.

Therefore, all utilize in the system of MIMO in transmission and reception, by based on the received electric field strength of entire system and effectively received electric field strength switching communication means or change coding method, under the situation of considering the interchannel correlation, can realize control, therefore can improve the quality of reception.

Wherein, the difference that the existence between the received electric field strength of average effective received electric field strength and entire system is very big shows that in channel matrix the difference between the characteristic value is very big and correlation vector is very big.When the correlation of interchannel is very big, consider and effectively utilize signal power, multiplexed signals is carried out demultiplexing and demodulation there is no efficient.

Therefore, in the present embodiment, be located in the code communication, the frame structure that addressable part 1801 usefulness transmission signal A as shown in figure 28 and B have an identical data symbols 2801 substitutes frame structure as shown in figure 20.Because the channel that utilizes this mode, its signal to utilize to have high correlation sends, and can obtain the path diversity effect, effectively utilize signal power and keep the expection quality of reception.In this, as shown in figure 15 also can be only from an antenna transmission in time 3 and times 4 transmission signal.In this case, though can not obtain the path diversity effect, can effectively utilize signal power equally.

But, in this case, transmission rate is to utilize half that sends under signal A and the B transmission different pieces of information code element situation.So,, for example, increase number of modulation levels, perhaps increase code rate R, can under the situation that does not reduce the transmission signaling rate, finish transmission by changing the modulation system that sends signal by utilizing very high signal power.

In addition, present embodiment has been described the Space Time Coding as a kind of coding method, but the present invention is not limited to this a kind of method, also can utilize other similar coding method in the reality, for example convolution code, Turbo code and LDPC (low-density checksum).

And then embodiment 9 can make up with any one embodiment 1,3,5,7.

(embodiment 10)

Embodiment 10 has described based on communicate by letter with the effective received electric field strength MIMO situation of the single carrier communication that switches with code communication of the received electric field strength of entire system.

Figure 29 is the block diagram according to embodiment 10 signal base station equipment structures.In addition, in base station equipment 2900 as shown in figure 29, the structure member identical with as shown in Figure 8 base station equipment 800 distributed the Reference numeral identical with Fig. 8, omits herein and describes.

Base station equipment 2900 as shown in figure 29 has identical structure except modulation system control assembly 155 being removed and being increased coding method control assembly 2951 and the addressable part 2901 with as shown in Figure 8 base station equipment 800.

Separating component 154 outputs to coding method control assembly 2951 with first and second information code elements.

To coding method control assembly 2951 input first and second information code elements, from the first information code element received electric field strength of reading system integral body, from second information code element, further read the value of average effective received electric field strength.Then, coding method control assembly 2951 determines whether to carry out MIMO communication or code communication based on the value that is read.More particularly, the received electric field strength of coding method control assembly 2951 computing system integral body and the difference X between the average effective received electric field strength, and time decision utilizes MIMO communication less than predetermined threshold as difference X, when difference X during more than or equal to predetermined threshold decision utilize code communication.Then, coding method control assembly 2951 will indicate the communication means index signal of determined communication means to output to addressable part 2901.

Each frame forms parts 101-1 and 101-2 imports separately as the transmission numerical data of importing, and numerical data is inserted channel estimation symbols and the generation of protection code element sends digital signal to sending, and exports this signal to addressable part 2901.

Input sends digital signals to addressable part 2901, when carrying out encoding process during for code communication from the communication means index signal of coding method control assembly 2951 outputs, the transmission digital signal of coding is outputed to modulating part 801-1 and 801-2.In addition, 1801 inputs send digital signal to addressable part, do not carry out encoding process when the communication means index signal from 2951 outputs of coding method control assembly is MIMO communication, and output sends digital signal to modulating part 801-1 and 801-2.

The communication terminal device of present embodiment is except having identical structure with the communication terminal device 900 of Fig. 9 described in the embodiment 2 the concrete processing details of Signal Processing Element 206.

At code communication constantly, for example, the inverse matrix of Signal Processing Element 206 calculating formulas (2) channel matrix in the communication terminal device sends signal by insert the multiply each other demodulation of decoding of this inverse matrix respectively from its left side on the both sides of formula (2).

Therefore, all utilize in the system of MIMO in transmission and reception, by based on the received electric field strength of entire system and effectively received electric field strength change coding method, can consider to control under the situation of interchannel correlation, therefore can improve the quality of reception.

In addition, embodiment 10 can make up with any one embodiment 2,4,6,8.

Above-mentioned each embodiment that mentions has described base station equipment and has sent the situation that signals, communication terminal device utilize a plurality of reception antenna received signals from a plurality of transmitting antennas.But the present invention also sets up under situation conversely in base station equipment and communication terminal device.

And then, above-mentioned each embodiment that mentions has described communication terminal device and has sent the situation of first and second information code elements to base station equipment, based on first and second information code elements, the parameters of base station equipment control modulation system etc. are method similarly, yet, the present invention is based on the first and second information code element communication terminal devices and in frame structure, determine similar modulation system etc., and will indicate the modulation system that determined etc. similarly the indication information situation that sends to base station equipment set up too.

In addition, in the present invention, communication terminal device averages the rank of the reception electric field of effective reception electric field and entire system in advance to be judged, and result of determination is sent to base station equipment.For example, as shown in figure 30, rank is divided into four-stage, and " 0 " arrives " 3 ", communication terminal device judges that respectively average effective receives the rank of the reception electric field of electric field and entire system, and the result who is judged is sent to base station equipment as first and second information code elements.Base station equipment receives the parameter of rank control modulation system of reception electric field of electric field and entire system or other based on average effective.Therefore the bit number of first and second information code elements can be reduced, thereby transmitting efficiency can be improved.For example, when the rank that provides was four-stage, each first and second information code element can be represented by two bits.

In addition, in the present invention,, for example can consider also that factors such as multipath situation, Doppler frequency shift and interference power are in decision modulation system or other modes except effective received electric field strength.

(embodiment 11)

Embodiment 11 has described the situation of the single carrier communication that utilizes MIMO, and received electric field strength and effective received electric field strength based on entire system switch transmitting antenna.

Figure 31 is the block diagram according to embodiment 11 signal base station equipment structures.In addition, in base station equipment 3100 as shown in figure 31, the structure member identical with as shown in figure 10 base station equipment 1000 distributed the Reference numeral identical with Figure 10, omits herein and describes.

The function that forms parts 3101-1 and 3101-2 except antenna control assembly 3151, frame is with antenna control assembly 1051 is different with 101-2 with frame formation parts 101-1, and base station equipment 3100 as shown in figure 31 has identical structure with base station equipment 1000 as shown in figure 10.

Each frame forms parts 3101-1 and 3102-2 generates the antenna identifying information code element of indication by antenna control assembly 3151 determined transmitting antennas; receive and send numerical data; and channel estimation symbols, protection code element, antenna identifying information code element be inserted into send numerical data and send digital signal, and export this signal respectively to S/P parts 102-1 or 102-2 to generate.

Figure 32 sends an example of signal frame structure for signal base station equipment 3100.In Figure 32, in sending signal A, each frame comprises channel estimation symbols 301, protection code element 302, antenna identifying information code element 3201 and data symbols 303 successively.Equally, in sending signal B, each frame comprises protection code element 351, channel estimation symbols 352, antenna identifying information code element 3251 and data symbols 353 successively.

Except data separating parts 204-1 is different with the concrete processing of 204-2 and frame formation parts 254, the communication terminal device of present embodiment has identical structure with embodiment 1 described communication terminal device 200.Data separating parts 204-1 and 204-2 output antenna identifying information form parts 254 to frame, and frame forms parts 254 first and second information code elements and antenna identification code element are inserted into the transmission numerical data, generates and sends digital signal.

Figure 33 is an example that sends signal frame structure according to present embodiment signal communication equipment terminal.In Figure 33, sending in the signal, each frame comprises first information code element 501, second information code element 502, antenna identifying information code element 3301 and data symbols 503 successively.

Separating component 154 is separated into data symbols (receiving digital data), first information code element, second information code element and antenna identifying information code element with receiving digital signals among Figure 31, and first information code element, second information code element and antenna identifying information code element are outputed to antenna control assembly 3151.

To antenna control assembly 3151 input first and second information code elements and antenna identifying information code elements,, and read the value of average effective received electric field strength from second information code element from the received electric field strength of first information code element reading system integral body.Then, antenna control assembly 3151 judges whether switch transmitting antenna based on the value that is read, and the decision transmitting antenna.Specifically, the received electric field strength of antenna control assembly 3151 computing system integral body and the difference X between the average effective received electric field strength, when difference X determines that transmitting antenna does not switch during less than predetermined threshold, and judge that transmitting antenna switches during more than or equal to predetermined threshold as difference X.Then, antenna control assembly 3151 will indicate the transmitting antenna index signal of the transmitting antenna that is determined to output to antenna alternative pack 1001 and frame formation parts 3101-1 and 3101-2.

In this, transmitting antenna switch finish after, even antenna control assembly 3151 will not switch transmitting antenna as difference X during more than or equal to predetermined threshold, when indication transmitting antenna identifying information code element is afterwards imported, just switch.In this way, can prevent that insignificant antenna from switching, and can make communication terminal device effectively utilize received electric field strength.

In addition, in the present invention, the frame structure of transmission signal is not limited to shown in figure 32 those in the base station equipment.For example, base station equipment can send signal with frame structure as shown in figure 34.In Figure 34, comprise channel estimation symbols 3401, protection code element 3402, protection code element 3403 and data symbols 3404 successively from each frame of transmitting antenna 105-1 signal transmitted.In addition, each frame from transmitting antenna 105-2 signal transmitted comprises protection code element 3421, channel estimation symbols 3422, protection code element 3423 and data symbols 3424 successively.In addition, each frame from transmitting antenna 105-3 signal transmitted comprises protection code element 3441, protection code element 3442, channel estimation symbols 3443 and data symbols 3444 successively.

Under the situation of Figure 34, have three groups of transmitting antennas, G1 (105-1 and 105-2), G2 (105-2 and 105-3) and G3 (105-3 and 105-1).Communication terminal device is preface (G1, G2, G3) receive channel estimating code element successively, calculates the received electric field strength of average effective received electric field strength and entire system based on channel estimation symbols, and sends with unaltered order and to feed back signal to base station equipment.Utilize the received electric field strength of average effective received electric field strength and entire system, the antenna decision parts comparison signal of base station equipment does not change the value of order when sending, and can judge the group of a maximization received signal quality of reception from three antenna sets.

In addition, in the present invention, signal can send with frame structure as shown in figure 35.In Figure 35, comprise channel estimation symbols 3501,3502,3503 and 3504 successively from each frame of transmitting antenna 105-1 signal transmitted, protection code element 3505 and 3506 and data symbols 3507.In addition, comprise channel estimation symbols 3521 and 3522, protection code element 3523 and 3524 successively, channel estimation symbols 3525 and 3526 and data symbols 3527 from each frame of transmitting antenna 105-2 signal transmitted.In addition, comprise protection code element 3541 and 3542, channel estimation symbols 3543,3544,3545 and 3546 and data symbols 3547 successively from each frame of transmitting antenna 105-3 signal transmitted.Figure 35 has explained and sent the orthogonal method of signal in two of three transmitting antennas.For example, (1,1) and (1 ,-1) satisfies orthogonality relation.Orthogonal signalling can be separated in the communication terminal device of received signal.

In the above-mentioned structure of mentioning, channel estimation symbols and protection code element are only required can segregated channel, and can discern one group of transmitting antenna; this group transmitting antenna sends the modulation signal by receiving equipment received; the perhaps order that sends of identification signal, for example, so order can be switched.

Utilize this method, send the information of signal, can in transmit frame, not provide the situation incision of antenna identifying information and channel number information to change antennas by utilizing channel estimation symbols identification.

(embodiment 12)

Embodiment 12 explanation utilizes the MIMO single carrier communication based on the received electric field strength of entire system and effective received electric field strength transmitting antenna situation about switching.

Figure 36 is the block diagram according to embodiment 12 signal base station equipment structures.In addition, in base station equipment 3600 as shown in figure 36, the structure member identical with base station equipment shown in Figure 11 1100 given the Reference numeral identical with Figure 11, omits herein and describes.

The function that base station equipment 3600 as shown in figure 36 forms parts 3601-1 and 3601-2 except antenna control assembly 3651, frame and antenna control assembly 1151 and frame formation parts 101-1 are different with 101-2, has identical structure with base station equipment 1100 shown in Figure 11.

Each frame forms parts 3601-1 and 3601-2 generates the antenna identifying information code element of indicating the transmitting antenna that is determined by the antenna control assembly; its input is sent numerical data; and channel estimation symbols, protection code element and antenna identifying information code element be inserted into send numerical data and send digital signal, and export this signal respectively to modulating part 801-1 or 802-2 to generate.

The communication terminal device of present embodiment has identical structure except the contents processing of data separating parts 204-1 and 204-2 and frame formation parts 254 with the communication terminal device of embodiment 1 described Fig. 2.Data separating parts 204-1 and 204-2 output antenna identifying information code element arrive frame and form parts 254, and frame forms parts 254 first and second information code elements and antenna identifying information code element are inserted in the transmission numerical data, and generates the transmission digital signal.

Separating component 154 is separated into data symbols (receiving digital data), first information code element, second information code element and antenna identifying information code element with receiving digital signals among Figure 36, and first information code element, second information code element and antenna identifying information code element are outputed to antenna control assembly 3651.

To antenna control assembly 3651 input first and second information code elements and antenna identifying information code elements, the received electric field strength of reading system integral body from first information code element reads the value that average effective receives electric field from second information code element.Then, antenna control assembly 3651 judges whether switch transmitting antenna based on the value that is read, and the decision transmitting antenna.Refer to more specifically, the received electric field strength of antenna control assembly 3651 computing system integral body and the difference X between the average effective received electric field strength, when difference X judges that transmitting antenna does not switch during less than predetermined threshold, and when difference X during more than or equal to predetermined threshold the judgement transmitting antenna switch.Then, 3651 outputs of antenna control assembly indicate the transmitting antenna index signal of the transmitting antenna that is determined to output to antenna alternative pack 1001 and frame formation parts 3601-1 and 3601-2.

In this, transmitting antenna switch finish after, even antenna control assembly 3651 will not switch transmitting antenna as difference X during more than or equal to predetermined threshold, when the antenna identifying information code element of afterwards indication transmitting antenna is imported, just switch.In this way, can prevent that insignificant antenna from switching, and can make communication terminal device effectively utilize received electric field strength.

(embodiment 13)

Embodiment 13 describe utilize multi-carrier communication, based on the received electric field strength of entire system and effectively received electric field strength change the situation of antenna performance.

Figure 37 is the block diagram according to embodiment 13 signal transmitting apparatus structures.In Figure 37, transmitting apparatus 3700 has frame and forms parts 3701-1 and 3701-2, addressable part 3702, S/P parts 3703-1 and 3703-2, IDFT parts 3704-1 and 3704-2, radio-frequency unit 3705-1 and 3705-2 and transmitting antenna 3706-1 and 3706-2.Each frame formation parts 3701-1 and 3701-2 are imported the transmission numerical data separately, channel estimation symbols and protection code element are inserted into generation transmission digital signal in the transmission numerical data, and export this signal to addressable part 3702.

3702 inputs send the encoding digital signals processing to addressable part, and the transmission digital signal of output encoder is to S/P parts 3703-1 and 3703-2.

S/P parts 3703-1 receives the transmission digital signal of having encoded, carries out serial/parallel conversion process, further carries out modulation treatment, and the modulation signal that output walks abreast is to IDFT parts 3704-1.S/P parts 3703-2 receives the transmission digital signal of having encoded, carries out serial/parallel conversion process, further carries out modulation treatment, and the modulation signal that output walks abreast is to IDFT parts 3704-2.

IDFT parts 3704-1 receives parallel modulation signal, this signal is carried out IDFT handle generation transmission baseband signal, and export this signal to radio-frequency unit 3705-1.IDFT parts 3704-2 receives parallel modulation signal, this signal is carried out IDFT handle generation transmission baseband signal, and export this signal to radio-frequency unit 3705-2.

Radio-frequency unit 3705-1 receives and sends baseband signal, and the up-conversion baseband signal generates and sends signal A, and this wireless signal sends from transmitting antenna 3706-1.Radio-frequency unit 3705-2 receives and sends baseband signal, and the up-conversion baseband signal generates and sends signal B, and this wireless signal sends from transmitting antenna 3706-2.

Above described be explanation according to present embodiment transmitting apparatus 3700 each building block.

The transmission signal frame structure of transmitting apparatus 3700 is with shown in Figure 20 identical.

Next, with reference to the block diagram of Figure 38, the structrual description of receiving equipment that carries out radio communication according to present embodiment and as shown in figure 37 transmitting apparatus is as follows.In Figure 38, receiving equipment 3800 has reception antenna 3801-1 and 3801-2, antenna performance and changes parts 3802-1 and 3802-2, radio-frequency unit 3803-1 and 3803-2, DFT parts 3804-1 and 3804-2, data separating parts 3805-1 and 3805-2, estimation unit 3806-1 to 3806-4, Signal Processing Element 3807, eigenvalue calculation parts 3808, electric field strength estimation section 3809, effective electric-field intensity calculating unit 3810, antenna performance judging part 3811.

When antenna characteristic judgment part part 3811 judges that when needing to change antenna performance, antenna performance changes the antenna performance that parts 3802-1 changes reception antenna 3801-1, and the signal that output is received by reception antenna 3801-1 is to radio-frequency unit 3803-1.Antenna performance changes parts 3802-2 and is judging the antenna performance that changes reception antenna 3802-2 when needing to change antenna performance when antenna characteristic judgment part part 3811, and exports the signal that received by reception antenna 3801-2 to radio-frequency unit 3803-2.In addition, the factor of consideration antenna performance comprises directivity, the polarization of antenna and the position is set.

The signal that input receives to radio-frequency unit 3803-1, this signal of down-conversion generates receiving baseband signal, outputs results to DFT parts 3804-1.The signal that input is received to radio-frequency unit 3802-2, this signal of down-conversion generates receiving baseband signal, outputs results to DFT parts 3804-2.

DFT parts 3804-1 receives receiving baseband signal, this signal is carried out DFT handle and output to data separating parts 3805-1.DFT parts 3804-2 receives receiving baseband signal, this signal is carried out DFT handle and output to data separating parts 3805-2.

Data separating parts 3805-1 is separated into the channel estimation symbols that sends signal A, channel estimation symbols and the data symbols that sends signal B with the receiving baseband signal that reception antenna 3801-1 receives, handles through DFT, output sends the channel estimation symbols of signal A to estimation unit 3806-1, output sends the channel estimation symbols of signal B to estimation unit 3806-2, and further the dateout code element arrives Signal Processing Element 3807.Data separating parts 3805-2 is separated into the channel estimation symbols that sends signal A, channel estimation symbols and the data symbols that sends signal B with the receiving baseband signal that reception antenna 3801-2 receives, handles through DFT, output sends the channel estimation symbols of signal A to estimation unit 3806-3, output sends the channel estimation symbols of signal B to estimation unit 3806-4, and the dateout code element is to Signal Processing Element 3807.

The channel estimation symbols of the transmission signal A that estimation unit 3806-1 input is received by reception antenna 3801-1 is carried out channel estimating to sending signal A, and the delivery channel estimated value is to Signal Processing Element 3807 and eigenvalue calculation parts 3808.The channel estimation symbols of the transmission signal B that estimation unit 3806-2 input is received by reception antenna 3801-1 is carried out channel estimating to sending signal B, and the delivery channel estimated value is to Signal Processing Element 3807 and eigenvalue calculation parts 3808.Estimation unit 3806-3 is received in the channel estimation symbols of the transmission signal A that reception antenna 3801-2 received, carries out channel estimating to sending signal A, and the delivery channel estimated value is to Signal Processing Element 3807 and eigenvalue calculation parts 3808.Estimation unit 3806-4 is received in the channel estimation symbols of the transmission signal B that reception antenna 3801-2 received, carries out channel estimating to sending signal B, and the delivery channel estimated value is to Signal Processing Element 3807 and eigenvalue calculation parts 3808.

For example, the inverse matrix of channel matrix in Signal Processing Element 3807 calculating formulas (2) is decoded and demodulation transmission signal S by multiplying each other from left end insertion inverse matrix respectively on the both sides of formula (2) ₁And S ₂

In this, Signal Processing Element 3807 does not need always to utilize data from two antenna 3801-1 and 3801-2, only utilizes the data of one of them antenna can demodulation send signal S yet ₁And S ₂Yet, utilizing under two data conditions, by obtaining diversity gain, can improve the quality of reception.

Eigenvalue calculation parts 3808 receive the channel estimation value that sends signal A and B, calculate corresponding to the characteristic value that forms the channel estimating value matrix, and export this characteristic value to effective electric-field intensity calculating unit 3810.

Electric field strength estimation section 3809 receives the receiving baseband signal of handling through DFT, estimate to receive the intensity of electric field, this intensity be each receiving baseband signal amplitude square, and estimated received electric field strength averaged, obtain the received electric field strength of entire system.To effective electric-field intensity calculating unit 3810, and the received electric field strength of output system integral body arrives antenna performance judging part 3811 corresponding to the received electric field strength of each receiving baseband signal in electric field strength estimation section 3809 output.

To received electric field strength and the characteristic value of effective electric-field intensity calculating unit 3810 inputs corresponding to each receiving baseband signal, multiply by each received electric field strength with the minimum power of characteristic value and obtain effective received electric field strength, effective received electric field strength is averaged acquisition average effective received electric field strength, and output average effective received electric field strength is to antenna performance judging part 3811.

Antenna performance judging part 3811 is judged when the difference X between the received electric field strength of average effective received electric field strength and entire system surpasses predetermined threshold needs to change antenna performance.Then, antenna performance judging part 3811 output result of determination change parts 3802-1 and 3802-2 to antenna performance.

In addition, antenna performance judging part 3811 can also determine whether to change antenna performance based on characteristic value.For example, in this case, antenna performance judging part 3811 calculates the characteristic value of each subcarrier, with value addition maximum in the characteristic value, and with value addition minimum in the characteristic value, obtain maximum after the addition and the difference between the minimum value, under the situation of difference, judge the characteristic that needs to change reception antenna, because channel relevancy increases in this case greater than predetermined threshold, be difficult to multiple signals demultiplexing and demodulation, therefore receiving feature worsens.

Above described be explanation according to each building block of present embodiment transmitting apparatus 3800.

Therefore, all utilize in the system of many antennas,, can preserve the expection quality of reception by the characteristic that received electric field strength and effective received electric field strength based on entire system change reception antenna where necessary in transmission and reception.

In addition, present embodiment being used under the situation of single carrier communication, in transmitting apparatus shown in Figure 37 3700, each S/P parts 3703-1 and 3703-2 are substituted by modulating part, and each IDFT parts 3704-1 and 3704-2 are substituted by the spread spectrum parts.And then in receiving equipment shown in Figure 38 3800, each DFT parts 3804-1 and 3804-2 are substituted by the despreading parts.

(embodiment 14)

Embodiment 14 describe the multi-carrier communication that utilizes MIMO, based on the received electric field strength of entire system and effectively the received electric field strength reception antenna change the situation of antenna performance.

Figure 39 is the block diagram according to embodiment 14 signal transmitting apparatus structures.In 39, transmitting apparatus 3900 has frame and forms parts 3901-1 and 3901-2, S/P parts 3902-1 and 3902-2, IDFT parts 3903-1 and 3903-2, radio-frequency unit 3904-1 and 3904-2 and transmitting antenna 3905-1 and 3905-2.

Frame is formed parts 3901-1 and 3901-2 input send numerical data and channel estimation symbols and protection code element are inserted into to send in the numerical data send digital signal, and export this signal respectively to S/P parts 3902-1 or 3902-2 to generate.

Input sends digital signal to S/P parts 3902-1, carries out serial/parallel conversion process, modulation treatment, and the parallel modulation signal of output is to IDFT parts 3903-1.Input sends digital signal to S/P parts 3902-2, carries out serial/parallel conversion process, and the parallel modulation signal of further modulation treatment, and output is to IDFT parts 3903-2.

To the parallel modulation signal of IDFT parts 3903-1 input, this signal is carried out IDFT handle generation transmission baseband signal, and export this signal to radio-frequency unit 3904-1.To the parallel modulation signal of IDFT parts 3903-2 input having carried out, this signal is carried out IDFT handle generation transmission baseband signal, and export this signal to radio-frequency unit 3904-2.

Input sends baseband signal to radio-frequency unit 3904-1, and the up-conversion baseband signal generates and sends signal A, sends this radio signal from transmitting antenna 3905-1.Input sends baseband signal to radio-frequency unit 3904-2, and the up-conversion baseband signal generates and sends signal B, sends this radio signal from transmitting antenna 3905-2.

Above described be explanation according to each building block of present embodiment transmitting apparatus 3900.

The transmission signal frame structure of transmitting apparatus 3900 is with shown in Figure 3 identical.

Next, with reference to square frame Figure 40, the structure of carrying out the receiving equipment of radio communication according to present embodiment and transmitting apparatus as shown in figure 39 will be described below.In Figure 40, receiving equipment 4000 has reception antenna 4001-1 and 4001-2, antenna performance and changes parts 4002-1 and 4002-2, radio-frequency unit 4003-1 and 4003-2, DFT parts 4004-1 and 4004-2, data separating parts 4005-1 and 4005-2, estimation unit 4006-1 to 4006-4, Signal Processing Element 4007, eigenvalue calculation parts 4008, electric field strength estimation section 4009, effective electric-field intensity calculating unit 4010, antenna performance judging part 4011.

When antenna characteristic judgment part part 4011 judges that when needing to change antenna performance, antenna performance changes the antenna performance that parts 4002-1 changes reception antenna 4001-1, and the signal that output receives in reception antenna 4001-2 place is to radio-frequency unit 4003-1.Antenna performance changes parts 4002-2 to be judged when needing to change antenna performance when antenna characteristic judgment part part 4011, changes the antenna performance of reception antenna 4001-1, and output at the signal of reception antenna 4001-2 place reception to radio-frequency unit 4003-2.

The signal that input is received to radio-frequency unit 4003-1, this signal of down-conversion generates receiving baseband signal, and outputs results to DFT parts 4004-1.The signal that input is received to radio-frequency unit 4003-2, this signal of down-conversion generates receiving baseband signal, and outputs results to DFT parts 4004-2.

To DFT parts 4004-1 input receiving baseband signal, this signal is carried out DFT handle and output to data separating parts 4005-1.Receiving baseband signal is received in input to DFT parts 4004-2, this signal is carried out DFT handle and output to data separating parts 4005-2.

Data separating parts 4005-1 will be received and will be separated into the channel estimation symbols that sends signal A, channel estimation symbols and the data symbols that sends signal B through the receiving baseband signal that DFT handles by reception antenna 4001-1, output sends the channel estimation symbols of signal A to estimation unit 4006-1, output sends the channel estimation symbols of signal B to estimation unit 4006-2, and the dateout code element is to Signal Processing Element 4007.Data separating parts 4005-2 will be received and will be separated into the channel estimation symbols that sends signal A, channel estimation symbols and the data symbols that sends signal B through the receiving baseband signal that DFT handles by reception antenna 4001-2, output sends the channel estimation symbols of signal A to estimation unit 4006-3, output sends the channel estimation symbols of signal B to estimation unit 4006-4, and the dateout code element is to Signal Processing Element 4007.

Estimation unit 4006-1 receives the channel estimation symbols of the transmission signal A that is received by reception antenna 4001-1, and carries out channel estimating to sending signal A, and the delivery channel estimated value is to Signal Processing Element 4007 and eigenvalue calculation parts 4008.Estimation unit 4006-2 receives the channel estimation symbols of the transmission signal B that is received by reception antenna 4001-1, and carries out channel estimating to sending signal B, and the delivery channel estimated value is to Signal Processing Element 4007 and eigenvalue calculation parts 4008.Estimation unit 4006-3 receives the channel estimation symbols of the transmission signal A that is received by reception antenna 4001-2, and sends the channel estimating of signal A, and the delivery channel estimated value is to Signal Processing Element 4007 and eigenvalue calculation parts 4008.Estimation unit 4006-4 receives the channel estimation symbols of the transmission signal B that is received by reception antenna 4001-2, and to sending the channel estimating of carrying out of signal B, the delivery channel estimated value is to Signal Processing Element 4007 and eigenvalue calculation parts 4008.

Signal Processing Element 4007 utilizes channel estimation value demodulating data code element, generates receiving digital data.

Eigenvalue calculation parts 4008 receive the channel estimation value that sends signal A and B, calculate the characteristic value corresponding to the matrix that forms channel estimation value, and export this characteristic value to effective electric-field intensity calculating unit 4010.

Electric field strength estimation section 4009 receives the receiving baseband signal of handling through DFT, estimate to receive the intensity of electric field, this intensity be each receiving baseband signal amplitude square, and estimated received electric field strength averaged, obtain the received electric field strength of entire system.To effective electric-field intensity calculating unit 4010, and the received electric field strength of output system integral body arrives antenna performance judging part 4011 corresponding to the received electric field strength of each receiving baseband signal in electric field strength estimation section 4009 output.

Effective electric-field intensity calculating unit 4010 is received corresponding to the received electric field strength of each receiving baseband signal and characteristic value, multiply by each received electric field strength with the minimum power of characteristic value and obtain effective received electric field strength, effective received electric field strength is averaged acquisition average effective received electric field strength, and output average effective received electric field strength is to antenna performance judging part 4011.

Antenna performance judging part 4011 is judged when the difference X between the received electric field strength of average effective received electric field strength and entire system surpasses predetermined threshold needs to change antenna performance.Then, antenna performance judging part 4011 output result of determination change parts 4002-1 and 4002-2 to antenna performance.

In addition, antenna performance judging part 4011 can determine whether to change antenna performance based on characteristic value.For example, in this case, antenna performance judging part 4011 calculates the characteristic value of each subcarrier, with value addition maximum in the characteristic value, with value addition minimum in the characteristic value, obtain maximum after the addition and the difference between the minimum value, under the situation of difference, judge the characteristic that needs to change reception antenna, because channel relevancy increases in this case greater than predetermined threshold, be difficult to multiple signals demultiplexing and demodulation, therefore receiving feature worsens.

Above described be explanation according to each building block of present embodiment transmitting apparatus 4000.

Therefore, all utilize in the system of many antennas,, can preserve the expection quality of reception by the characteristic that received electric field strength and effective received electric field strength based on entire system change reception antenna where necessary in transmission and reception.

In addition, present embodiment being used under the situation of single carrier communication, in transmitting apparatus shown in Figure 39 3900, each S/P parts 3902-1 and 3902-2 are substituted by modulating part, and each IDFT parts 3903-1 and 3903-2 are substituted by the spread spectrum parts.And then in receiving equipment shown in Figure 40 4000, each DFT parts 4004-1 and 4004-2 are substituted by the despreading parts.

(embodiment 15)

Embodiment 15 has described the situation of utilizing multi-carrier communication, and receiving equipment switches reception antenna based on received electric field strength and effective received electric field strength of entire system.In addition, the structure of present embodiment transmitting apparatus is identical with transmitting apparatus among embodiment 13 described Figure 37, omits herein and describes.

Figure 41 is the block diagram according to embodiment 15 signal receiving equipment structures.In addition, in receiving equipment 4100 as shown in figure 41, and give the Reference numeral identical, omit herein and describe with Figure 38 at the identical structure member of receiving equipment shown in Figure 38 3800.

Receiving equipment 4100 shown in Figure 41 has identical structure with receiving equipment 3800 shown in Figure 38 except antenna performance being changed parts 3802-1 and 3802-2 and antenna performance judging part 3811 and remove and increase antenna alternative pack 4101-1 and 4101-2 and antenna control assembly 4102.In addition, receiving equipment 4100 shown in Figure 41 has a plurality of reception antennas, and 3801-1 is to 3801-6.

Antenna control assembly 4102 is judged when the difference X between the received electric field strength of average effective received electric field strength and entire system surpasses predetermined threshold needs to switch reception antenna, then, antenna control assembly 4102 output result of determination are to antenna alternative pack 4101-1 and 4101-2.

In addition, antenna control assembly 4102 can be based on characteristic value selective reception antenna.For example, in this case, antenna control assembly 4102 calculates the characteristic value of each subcarrier, with value addition maximum in the characteristic value, with value addition minimum in the characteristic value, obtain maximum after the addition and the difference between the minimum value, under the situation of difference, judge the characteristic that needs to change reception antenna, because channel relevancy increases in this case greater than predetermined threshold, be difficult to multiple signals demultiplexing and demodulation, therefore receiving feature worsens.

Antenna alternative pack 4101-1 from reception antenna 3801-1 to 3801-3 the selective reception antenna, and the signal of selecting that antenna received outputed to radio-frequency unit 3803-1.Antenna alternative pack 4101-2 from reception antenna 3801-4 to 3801-6 the selective reception antenna, and the signal of selecting that antenna received outputed to radio-frequency unit 3803-2.In addition, when the same day, line traffic control parts 4102 definite needs switched reception antenna, antenna alternative pack 4101-1 and 4102-2 switched reception antenna.In addition, as a kind of method of switching reception antenna, can consider the method for the reception antenna of selective reception electric field strength maximum.

Therefore, all utilize in the system of many antennas, switch reception antenna where necessary, can guarantee the quality of reception by received electric field strength and effective received electric field strength based on entire system in transmission and reception.

In addition, present embodiment has been described the situation of the signal down-conversion generation receiving baseband signal that selected reception antenna received, but the present invention is not limited to this a kind of situation.Also can distinguish the signal generation receiving baseband signal that each reception antenna of down-conversion is received, and from these signals, select a signal.

In addition, present embodiment being used under the situation of single carrier communication, in transmitting apparatus shown in Figure 37 3700, each S/P parts 3703-1 and 3703-2 are substituted by modulating part, and each IDFT parts 3704-1 and 3704-2 are substituted by the spread spectrum parts.And then in receiving equipment shown in Figure 41 4100, each DFT parts 3804-1 and 3804-2 are substituted by the despreading parts.

(embodiment 16)

Embodiment 16 describes the situation of the multi-carrier communication that utilizes MIMO, and receiving equipment switches reception antenna based on received electric field strength and effective received electric field strength of entire system.In addition, the structure of transmitting apparatus is identical with the transmitting apparatus 3900 of Figure 39 described in the embodiment 14 in the present embodiment, omits herein and describes.

Figure 42 is the block diagram according to embodiment 16 signal receiving equipment structures.In addition, in receiving equipment 4200 as shown in figure 42, the structure member identical with receiving equipment shown in Figure 40 4000 given the same reference numerals with Figure 40, omits herein and describes.

Receiving equipment 4200 as shown in figure 42 has identical structure with as shown in figure 40 receiving equipment 4000 except antenna performance being changed parts 4002-1 and 4002-2 and antenna performance judging part 4011 and remove and increase antenna alternative pack 4201-1 and 4201-2 and antenna control assembly 4202.In addition, receiving equipment 4200 as shown in figure 42 has a plurality of reception antennas, and 4001-1 is to 4001-6.

Antenna control assembly 4202 is judged when the difference X between the received electric field strength of average effective received electric field strength and entire system surpasses predetermined threshold needs to switch reception antenna, then, antenna control assembly 4202 output result of determination are to antenna alternative pack 4201-1 and 4201-2.

In addition, antenna control assembly 4202 can be based on characteristic value selective reception antenna.For example, in this case, antenna control assembly 4202 calculates the characteristic value of each subcarrier, with value addition maximum in the characteristic value, with value addition minimum in the characteristic value, obtain maximum after the addition and the difference between the minimum value, under the situation of difference, judge the characteristic that needs to change reception antenna, because channel relevancy increases in this case greater than predetermined threshold, be difficult to multiple signals demultiplexing and demodulation, therefore receiving feature worsens.

Antenna alternative pack 4201-1 from reception antenna 4001-1 to 4001-3 the selective reception antenna, and the signal of selecting that antenna received outputed to radio-frequency unit 4003-1.Antenna alternative pack 4201-2 from reception antenna 4001-4 to 4001-6 the selective reception antenna, and the signal of selecting that antenna received outputed to radio-frequency unit 4003-2.In addition, antenna alternative pack 4201-1 and 4202-2 line traffic control on same day parts 4202 are judged switching reception antenna when needing to switch reception antenna.

Therefore, all utilize in the system of many antennas, switch reception antenna where necessary, can guarantee the quality of reception of expecting by received electric field strength and effective received electric field strength based on entire system in transmission and reception.

In addition, present embodiment has been described the situation that the signal down-conversion that selected reception antenna is received generates receiving baseband signal, but the present invention is not limited to this a kind of situation.Also can distinguish the signal generation receiving baseband signal that each reception antenna of down-conversion is received, and from these signals, select a signal.

In addition, present embodiment being used under the situation of single carrier communication, in transmitting apparatus shown in Figure 39 3900, each S/P parts 3902-1 and 3902-2 are substituted by modulating part, and each IDFT parts 3903-1 and 3903-2 are substituted by the spread spectrum parts.And then in receiving equipment shown in Figure 42 4200, each DFT parts 4004-1 and 4004-2 are substituted by the despreading parts.

(embodiment 17)

Embodiment 17 has described the situation of the multi-carrier communication that utilizes MIMO, and antenna performance changes based on received electric field strength and effective received electric field strength of entire system.In addition, the structure of communication terminal device is identical with the communication terminal device 200 of Fig. 2 described in the embodiment 1 in the present embodiment, omits herein and describes.

Figure 43 is the block diagram according to embodiment 17 signal base station equipment structures.In addition, in base station equipment 4300 as shown in figure 43, the structure member identical with base station equipment shown in Figure 1 100 given the Reference numeral identical with Fig. 1, omits herein and describes.

Base station equipment 4300 as shown in figure 43 changes parts 4301-1 and the 4301-2 with base station equipment 100 shown in Figure 1 and has identical structure except modulation system control assembly 155 being removed and being increased antenna performance judging part 4351 and antenna performance.

Separating component 154 outputs first and second information code elements are to antenna performance judging part 4351.

To antenna performance judging part 4351 input first and second information code elements, the received electric field strength of reading system integral body from first information code element, and from second information code element, read the value of average effective received electric field strength.Then, antenna performance judging part 4351 is judged when the difference X between the received electric field strength of average effective received electric field strength and entire system surpasses predetermined threshold needs to change antenna performance, then, the control signal (hereinafter referred to as " antenna performance decision signal ") of antenna performance judging part 4351 output indication result of determination changes parts 4301-1 and 4301-2 to antenna performance.

Radio-frequency unit 104-1 reception sends baseband signal, and the up-conversion baseband signal generates and sends signal A, and exports this signal to antenna performance change parts 4301-1.Radio-frequency unit 104-2 reception sends baseband signal, and the up-conversion baseband signal generates and sends signal B, and exports this signal to antenna performance change parts 4301-2.

When antenna characteristic judgment part part 4351 judges that antenna performance changes the antenna performance that parts 4301-1 changes transmitting antenna 105-1 when needing to change antenna performance, and will send signal A by radio communication and send.When antenna characteristic judgment part part 4351 judges that antenna performance changes the antenna performance that parts 4301-2 changes transmitting antenna 105-2 when needing to change antenna performance, and will send signal B by radio communication and send.

Therefore, all utilize in the system of many antennas in transmission and reception, change antenna performance by received electric field strength and effective received electric field strength, can under the situation of considering the interchannel correlation, realize control, and so can improve the quality of reception based on entire system.

(embodiment 18)

Embodiment 18 has described the situation of the single carrier communication that utilizes MIMO, based on received electric field strength and effective received electric field strength change antenna performance of entire system.In addition, communication terminal device 900 is identical among the structure of present embodiment communication terminal device and the Fig. 9 described in the embodiment 2, therefore omits herein and describes.

Figure 44 is the block diagram according to embodiment 18 signal base station equipment structures.In addition, in base station equipment 4400 as shown in figure 44, the structure member identical with base station equipment shown in Figure 8 800 given the Reference numeral identical with Fig. 8, omits herein and describes.

Base station equipment 4400 as shown in figure 44 changes parts 4401-1 and the 4401-2 with base station equipment shown in Figure 8 and has identical structure except modulation system control assembly 155 being removed and being increased antenna performance judging part 4451 and antenna performance.

Separating component 154 outputs first and second information code elements are to antenna performance judging part 4451.

To antenna performance judging part 4451 input first and second information code elements, the received electric field strength of reading system integral body from first information code element, and from second information code element, read the value of average effective received electric field strength.Then, antenna performance judging part 4451 is judged when the difference X between the received electric field strength of average effective received electric field strength and entire system surpasses predetermined threshold needs to change antenna performance, then, the antenna performance decision signal of antenna performance judging part 4451 output indication result of determination changes parts 4401-1 and 4401-2 to antenna performance.

Radio-frequency unit 104-1 reception sends baseband signal, and the up-conversion baseband signal generates and sends signal A, and exports this signal to antenna performance change parts 4401-1.Radio-frequency unit 104-2 reception sends baseband signal, and the up-conversion baseband signal generates and sends signal B, and exports this signal to antenna performance change parts 4401-2.

When antenna characteristic judgment part part 4451 judges that antenna performance changes the antenna performance that parts 4401-1 changes transmitting antenna 105-1 when needing to change antenna performance, and will send signal A by radio communication and send.When antenna characteristic judgment part part 4451 judges that antenna performance changes the antenna performance that parts 4401-2 changes transmitting antenna 105-2 when needing to change antenna performance, and will send signal B by radio communication and send.

Therefore, all utilize in the system of many antennas in transmission and reception, change antenna performance by received electric field strength and effective received electric field strength, can under the situation of considering the interchannel correlation, realize control, and so can improve the quality of reception based on entire system.

In the present invention, the number of the number of transmitting antenna and reception antenna without limits.And then at aforesaid each embodiment, ofdm system is as the exemplary application of multicarrier system, and cdma system is as the exemplary application of single-carrier system.Yet the present invention is not limited to these examples.

And then received electric field strength estimates that the present invention is restriction on the method for estimation of received electric field strength among aforesaid each embodiment from the signal handled through DCT or despread signal.

And then, among aforesaid each embodiment, carry out parameter control based on the difference between the received electric field strength of average effective received electric field strength and entire system.But the present invention is not limited thereto, for example, carries out parameter control by the method for utilizing the average effective received electric field strength, for example, utilizes the ratio between the received electric field strength of average effective received electric field strength and entire system.

In addition, in the present invention, can be based on carry out parameter control corresponding to the difference of the characteristic value of difference between the received electric field strength of average effective received electric field strength and entire system.

From high-visible as mentioned above, according to the present invention, send and receive all utilize many antennas system can in, by received electric field strength and effective received electric field strength control modulation system or otherwise parameter based on entire system, can under the situation of considering the interchannel correlation, control modulation system or otherwise parameter, therefore can improve the quality of reception.

The No.2003-78037 that the No.2003-41133 that the No.2003-8002 that submits in the No.2002-354102 that submits in the Japanese patent application No.2002-342019 that this application was submitted to based on November 26th, 2002, on December 5th, 2002, on January 16th, 2003, on February 19th, 2003 submit to and on March 20th, 2003 submit to, the full content of reference here clearly is included in wherein.

Commercial Application

The present invention is applicable at sending and receiving and utilizes many antennas to carry out in the communication equipment in the system of radio communication.

Claims (20)

1. the communication means of communication terminal, it is at the base station apparatus with a plurality of base station side antennas and have between the communication terminal of the end side antenna more than 1 and carry out radio communication, may further comprise the steps:

Use the step of described end side antenna reception from the signal of described base station apparatus;

With the feedback signal of the selection of relevant described base station side antenna step with described end side antenna transmission.

2. the communication means of communication terminal according to claim 1,

Described feedback signal comprises the antenna identifying information signal of the base station side antenna more than 1 of indicating to use in a plurality of base station side antennas of described base station apparatus.

3. the communication means of communication terminal according to claim 1,

Described feedback signal comprises the antenna identifying information signal of the combination of the base station side antenna of indicating to use in a plurality of base station side antennas of described base station apparatus.

4. the communication means of communication terminal, it is at the base station apparatus with a plurality of base station side antennas and have between the communication terminal of a plurality of end side antennas and carry out radio communication; May further comprise the steps:

Use the step of described end side antenna reception from the signal of described base station apparatus;

With the feedback signal of the selection of relevant described base station side antenna step with described end side antenna transmission.

5. the communication means of communication terminal according to claim 4,

Described feedback signal comprises the antenna identifying information signal of the base station side antenna of indicating to use in a plurality of base station side antennas of described base station apparatus.

6. the communication means of communication terminal according to claim 4,

Described feedback signal comprises the antenna identifying information signal of the combination of the base station side antenna of indicating to use in a plurality of base station side antennas of described base station apparatus.

7. the communication means of base station apparatus, it is at the base station apparatus with a plurality of base station side antennas and have between the communication terminal of the end side antenna more than 1 and carry out radio communication; May further comprise the steps:

The step that the feedback signal of the selection of relevant described base station side antenna is received with described base station side antenna from described communication terminal;

From described a plurality of base station side antennas, select to be used for the step of the base station side antenna more than 1 of the transmission of signal according to described feedback signal;

Step with selected base station side antenna transmission signal more than 1.

8. the communication means of base station apparatus according to claim 7,

Described feedback signal comprises the antenna identifying information signal of the base station side antenna of indicating to use in a plurality of base station side antennas of described base station apparatus.

9. the communication means of base station apparatus according to claim 7,

Described feedback signal comprises the antenna identifying information signal of the combination of the base station side antenna of indicating to use in a plurality of base station side antennas of described base station apparatus.

10. the communication means of base station apparatus according to claim 7,

The signal that sends from described base station apparatus comprises antenna identifying information code element, the channel estimation symbols of the combination of representing selected base station side antenna and protects code element.

11. the communication means of base station apparatus, it is at the base station apparatus with a plurality of base station side antennas and have between the communication terminal of a plurality of end side antennas and carry out radio communication; May further comprise the steps:

The step that the feedback signal of the selection of relevant described base station side antenna is received with described base station side antenna from described communication terminal;

From described a plurality of base station side antennas, select to be used to send the step of the base station side antenna more than 1 of signal according to described feedback signal;

Step with selected base station side antenna transmission signal more than 1.

12. the communication means of base station apparatus according to claim 11,

Described feedback signal comprises the antenna identifying information signal of the base station side antenna of indicating to use in a plurality of base station side antennas of described base station apparatus.

13. the communication means of base station apparatus according to claim 11,

Described feedback signal comprises the antenna identifying information signal of the combination of the base station side antenna of indicating to use in a plurality of base station side antennas of described base station apparatus.

14. the communication means of base station apparatus according to claim 11,

The signal that sends from described base station apparatus comprises antenna identifying information code element, the channel estimation symbols of the combination of representing selected base station side antenna and protects code element.

15. wireless communication system is at the base station apparatus with a plurality of base station side antennas with have between the communication terminal of the end side antenna more than 1 and carry out radio communication;

Described base station apparatus receives with described base station side antenna from the feedback signal of described communication terminal to the selection of relevant described base station side antenna, from described a plurality of base station side antennas, select to be used for the base station side antenna more than 1 of the transmission of signal according to described feedback signal, with selected base station side antenna transmission signal more than 1;

Described communication terminal uses described end side antenna to receive signal from described base station apparatus, with described feedback signal with described end side antenna transmission.

16. wireless communication system according to claim 15,

Described feedback signal comprises the antenna identifying information signal of the base station side antenna more than 1 of indicating to use in a plurality of base station side antennas of described base station apparatus.

17. wireless communication system according to claim 15,

Described feedback signal comprises the antenna identifying information signal of the combination of the base station side antenna of indicating to use in a plurality of base station side antennas of described base station apparatus.

18. wireless communication system is at the base station apparatus with a plurality of base station side antennas with have between the communication terminal of a plurality of end side antennas and carry out radio communication;

Described base station apparatus receives with described base station side antenna from the feedback signal of described communication terminal to the selection of relevant described base station side antenna, from described a plurality of base station side antennas, select to be used for the base station side antenna more than 1 of the transmission of signal according to described feedback signal, with selected base station side antenna transmission signal more than 1;

Described communication terminal uses described a plurality of end side antenna to receive signal from described base station apparatus, with described feedback signal with described end side antenna transmission.

19. wireless communication system according to claim 18,

Described feedback signal comprises the antenna identifying information signal of the base station side antenna more than 1 of indicating to use in a plurality of base station side antennas of described base station apparatus.

20. wireless communication system according to claim 18,

Described feedback signal comprises the antenna identifying information signal of the combination of the base station side antenna of indicating to use in a plurality of base station side antennas of described base station apparatus.

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