JP2003169039A - Transmitter, receiver, and transmitting and receiving method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively use an area in which data are not mapped by interleaving. <P>SOLUTION: A channel coder part 102 performs error correction encoding (channel CODEC) for a data sequence inputted from an input terminal 101. An interleaving part 103 performs interleaving for the data sequence after the error correction encoding. A known signal generation part 104 generates a known signal between transmission and reception. A data assignment detection part 105 detects how the data interleaved by the ineterleaving part 103 are assigned and informs a data mapping part 106 of a data section which is not mapped. The data mapping part 106 maps the data into a prescribed format, fills a free data section with the known signal generated by the known signal generation part 104, and outputs them from an output terminal 107. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmitting device, a receiving device and a transmitting / receiving method in wireless communication.

[0002]

2. Description of the Related Art FIG. 8 shows GSM (Global System for Mo
(bil communication), it is a diagram showing a data format of one slot, and has a configuration in which a known signal of 26 bits is inserted between two information bits (data section) of 57 bits.

FIG. 9 is a block diagram showing the structure of a conventional transmitter. In FIG. 9, the channel coder unit 12
Performs error correction coding (channel codec) on the data string of the data format shown in FIG. 8 input from the input terminal 11. The interleaving unit 13 interleaves the error-correction-coded data string. The data mapping unit 14 maps the data in a prescribed format and outputs the data from the output terminal 15.

FIG. 10 is a diagram showing an interleave arrangement of data in the interleave section 13. As shown in FIG. 10, the error-correction-coded data string is divided into a predetermined amount of units from a continuous state by interleaving,
Bursts are placed with the same amount of space as the separated units.

FIG. 11 is a diagram showing an example of interleave mapping in the data mapping unit 14. Figure 1
As shown in FIG. 1, each data is arranged so as to occupy a half area of the slot.

The signal transmitted from FIG. 9 is demodulated in a receiver (not shown). As described above, the conventional transmission device sequentially transmits data according to the interleave specification.

In the case of the mapping shown in FIG. 11, TC
Immediately after moving to H, there are cases where the first 4 slots and the last 4 slots have valid bits only in half the area, and an area (empty data section) in which no data is mapped occurs.

[0008]

However, since the above-mentioned conventional transmitter transmits data in the state shown in FIG. 11, the data existing in the first half of the four slots and the last half of the four slots in the receiver are transmitted. The area 21 that is vacant in order to obtain is also demodulated, resulting in useless arithmetic processing.

The present invention has been made in view of the above points, and an object of the present invention is to provide a transmitting apparatus, a receiving apparatus, and a transmitting / receiving method capable of effectively utilizing an area where data is not mapped by interleaving.

[0010]

The transmitting apparatus of the present invention is an interleaving means for interleaving data, a known signal generating means for generating a known signal between transmission and reception, and a section in which data after interleaving is not mapped. A configuration is provided that includes data assignment detection means for detecting a vacant section and mapping means for mapping the generated known signal to the vacant section.

With this configuration, the transmitter can transmit a signal in which a known signal is filled in the empty data section and the receiver can use this known signal. Therefore, the area where data is not mapped is effectively used by interleaving. You can

The transmitting apparatus of the present invention comprises an interleaving means for interleaving data, a known signal generating means for generating a known signal between transmission and reception according to the type of channel, and a generated known signal for the type of the channel. And a mapping means for mapping the interleaved data determined by the above to a section where the data is not mapped.

With this configuration, the transmitting device can transmit a signal in which a known signal is filled in the empty data section and the receiving device can use this known signal, so that the area where data is not mapped is effectively used by interleaving. You can Moreover, the transmission device can fill the known signal in the empty data section in consideration of the type of the transmission channel,
Since many known signals can be transmitted in the transmission channel having a long empty data section, the performance of the receiving device can be further improved. This is considered to be a very effective process from the viewpoint that the estimation accuracy from the initial state can be further improved in the initial state in which the main mapping occurs immediately after moving to TCH.

The known signal generating means in the transmitting apparatus of the present invention has a structure for generating the known signal in association with the known signal inserted in the data format.

With this configuration, the receiving device can utilize a continuous long known signal sequence, so that the receiving performance can be further improved. In particular, the convergence characteristic is improved when the receiving device estimates the propagation path.

The known signal generating means in the transmitting apparatus of the present invention generates a known signal independently of the known signal inserted in the data format or associates with the known signal according to the known signal generation length determined in advance by the system. A known signal is generated.

With this configuration, the transmitter generates the known signal independently of the known signal inserted in the data format according to the preset known signal generation length.
Alternatively, it is possible to select whether to generate a known signal in association with each other, so that adaptive control can be performed.

The base station apparatus of the present invention is configured to include any one of the above-mentioned transmitting apparatuses. Further, the communication terminal device of the present invention is configured to include any one of the above transmitting devices.

With these configurations, the area where data is not mapped by interleaving can be effectively used, so that the transmission efficiency in wireless communication can be improved.

The receiving apparatus of the present invention comprises a demodulation means for specifying a data section in which a known signal is filled based on a channel and demodulating the known signal and data, and a deinterleaving means for deinterleaving the demodulated data. The configuration including is adopted.

With this configuration, the transmitting device can transmit a signal in which a known signal is filled in the empty data section and the receiving device can use this known signal, so that the area where data is not mapped is effectively used by interleaving. You can Moreover, the transmission device can fill the known signal in the empty data section in consideration of the type of the transmission channel,
Since many known signals can be transmitted in the transmission channel having a long empty data section, the performance of the receiving device can be further improved.

The receiving device of the present invention can improve the receiving performance based on the demodulation means for demodulating the known signal and data, the deinterleaving means for deinterleaving the demodulated data, and the demodulation result of the demodulation means. A configuration is provided that includes a determining unit that determines a possible factor, and a transmission mapping requesting unit that requests a data mapping method from a transmitting device of a communication partner based on the determination result of the determining unit.

With this configuration, the receiving device can request the transmitting device to effectively utilize the empty data section, so that the receiving performance of the receiving device can be surely improved.

The base station apparatus of the present invention is configured to include any one of the above receiving apparatuses. Further, the communication terminal device of the present invention is configured to include any one of the above receiving devices.

With these configurations, the area where data is not mapped by interleaving can be effectively used, so that the transmission efficiency in wireless communication can be improved.

In the transmission / reception method of the present invention, the transmission device interleaves data, generates a known signal between transmission and reception, detects a vacant interval where the interleaved data is not mapped, and generates the known signal. A method is used in which a signal is mapped to the free space, the receiving device demodulates the known signal and data, and deinterleaves the demodulated data.

By this method, the area where data is not mapped by interleaving can be effectively used, so that the transmission efficiency in wireless communication can be improved.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION The essence of the present invention is that a transmitting apparatus fills a known signal in an area where data is not mapped by interleaving and transmits the signal, and a receiving apparatus uses the known signal to improve reception performance.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

(Embodiment 1) FIG. 1 is a block diagram showing a configuration of a transmitting apparatus according to Embodiment 1. In FIG. 1, channel coder section 102 performs error correction coding (channel codec) on the data string input from input terminal 101, and outputs the result to interleaving section 103.
The interleaving unit 103 performs interleaving on the error-correction-encoded data sequence, and the data assignment detecting unit 1
04 and the data mapping unit 105.

The known signal generation unit 104 generates a known signal between transmission and reception and outputs it to the data mapping unit 106.

The data assignment detection unit 105 detects how the data interleaved by the interleaving unit 103 is allocated, and a data section not mapped (hereinafter referred to as “empty data section”) is data mapping section 106. Let us know. The data mapping unit 106 maps data in a prescribed format, fills the known signal generated by the known signal generation unit 104 in the empty data section, and outputs the filled signal from the output terminal 107.

FIG. 2 shows a receiver for receiving the signal transmitted from the transmitter shown in FIG. In FIG. 2, demodulation section 203 synchronizes based on the timing signal input from input terminal 202, and demodulates the received signal input from input terminal 201. Then, demodulation section 203 outputs the data portion of the demodulated signal to deinterleave section 204, and outputs a known signal from output terminal 205. The known signal output from the output terminal 205 is used to improve the reception performance. As an example of improving the reception performance, a known signal is used for initial acquisition of frequency offset estimation, is used for improving estimation accuracy of channel estimation, or is used for calibration (reception distortion compensator). Can be mentioned.

The deinterleaving section 204 is a demodulating section 203.
The data string input from is deinterleaved and output to the channel decoder unit 206.

The channel decoder unit 206 performs a process (channel decoding) for decoding the error correction coding performed by the channel coder unit 206 on the data string input from the deinterleave unit 204, and outputs the output terminal 207.
To output data.

As described above, according to the present embodiment, the transmitting device transmits a signal in which the known signal is filled in the empty data section, and the receiving device can use this known signal, so that the data is interleaved. Areas that are not mapped can be effectively used.

Here, as shown in FIG. 8, the known signal is also inserted in the normal data format. The known signal generation unit 104 can generate a known signal independently of the known signal inserted in the data format, or can generate a known signal in association with the known signal. By generating the signal in association with the known signal inserted in the data format and setting it as one known signal section, the receiving device can use a continuous long known signal sequence, so that the receiving performance can be further improved. it can. In particular,
When the receiving device estimates the propagation path, the convergence characteristic is improved.

(Embodiment 2) Here, in each transmission channel, a slot having an empty data section and the length of the empty data section are fixed. For example, in transmission channel A, half of the first 4 slots and the last 4 slots are empty data sections, and in transmission channel B, the first 18 slots and half areas of the last 18 slots are empty data sections.

In the second embodiment, a case where a known signal is filled in a vacant data section in consideration of the type of transmission channel will be described.

FIG. 3 is a block diagram showing the configuration of the transmitting apparatus according to the second embodiment. In the transmitter of FIG. 3, the same components as those in FIG. 1 will be assigned the same reference numerals as those in FIG. 1 and description thereof will be omitted.

Compared to FIG. 1, the transmitter of FIG. 3 has a configuration in which the data assignment detection unit 105 is deleted and an input terminal 301 for inputting a channel type signal is added. Also,
The operation of the known signal generator 302 is the known signal generator 1 of FIG.
Unlike 04, the operation of the data mapping unit 303 is as shown in FIG.
The data mapping unit 106 of FIG.

The input terminal 301 is a known signal generator 302.
Also, it is connected to the data mapping unit 303 and inputs a channel type signal indicating the type of transmission channel.

Since the known signal generating section 302 uniquely determines the slot having an empty data section and the length of the empty data section for each transmission channel, the input terminal 3
Based on the channel type signal input from 01, a known signal is generated in accordance with the empty data section and output to the data mapping unit 303.

The data mapping unit 303 uses the input terminal 3
The empty data section is specified based on the channel type signal input from 01, the data is mapped to the specified format, the known signal generated by the known signal generation unit 302 is filled in the empty data section, and the empty terminal is output from the output terminal 107. Output.

FIG. 4 shows a receiver for receiving the signal transmitted from the transmitter shown in FIG. In the receiving apparatus of FIG. 4, the same components as those in FIG. 2 will be assigned the same reference numerals as those in FIG. 1 and description thereof will be omitted.

The receiving apparatus of FIG. 4 has a configuration in which an input terminal 401 for inputting a channel type signal is added, as compared with FIG. Further, the operation of the demodulation unit 402 is similar to that of the demodulation unit 20 of FIG.
Different from 3.

The demodulation section 402 specifies the data section in which the known signal is filled based on the channel type signal input from the input terminal 401, synchronizes based on the timing signal input from the input terminal 202, and inputs the input terminal 201. The received signal input from is demodulated. Then, the demodulation unit 402
Is the deinterleaver 20 for the data portion of the demodulated signal.
4 and outputs a known signal from the output terminal 205.

As described above, according to the present embodiment, in addition to the effects of the first embodiment, the transmitting device can fill the known signal into the empty data section in consideration of the type of the transmission channel, and the empty data section. Since a large number of known signals can be transmitted in the transmission channel having a long length, the performance of the receiving device can be further improved.

The known signal generator 302 can also generate a known signal independently of the known signal inserted in the data format, as in the known signal generator 104 of FIG. Can also be generated.

(Third Embodiment) In the third embodiment, a case will be described in which it is selected whether to generate a known signal independently of a known signal inserted in a data format or to generate a known signal in association with the known signal. .

FIG. 5 is a block diagram showing the configuration of the transmitting apparatus according to the third embodiment. In the transmitter of FIG. 5, the same components as those in FIG. 1 will be assigned the same reference numerals as those in FIG. 1 and description thereof will be omitted.

Compared to FIG. 1, the transmitting apparatus of FIG. 5 has a configuration in which the data assignment detecting section 105 is deleted and a known signal generation length holding section 501 is added. Moreover, the operation of the known signal generation unit 502 is different from that of the known signal generation unit 104 of FIG.
The operation of the data mapping unit 503 is different from that of the data mapping unit 106 in FIG.

The known signal generation length holding unit 501 is set with a known signal generation length which is predetermined by the system. Therefore, when filling one known signal by combining the existing known signal section and the empty data section, the generation length of the known signal section + the empty data section is set, and the existing known signal section and the existing data section are separated from each other into the empty data section. When filling the known signal of, the data length to be filled in the empty data section is set.
For example, in the case of a normal burst of GSM, the known signal section is 26 symbols, and assuming that the empty data section is α symbols, when one known signal is filled by combining the existing known signal section and the empty data section (26 + α symbols) Is set and (α symbol) is set when another known signal is filled in the empty data section separately from the existing known signal section.

The known signal generation unit 502 generates a known signal according to the known signal generation length set in the known signal generation length holding unit 501. For example, the known signal generation length is (2
6 + α) symbols, a known signal that is combined with the existing known signal section is generated, and if it is α symbols,
A known signal independent of the existing known signal section is generated.

The data mapping unit 503 specifies a vacant data section based on the known signal generation length set in the known signal generation length determination section 501, maps data in a prescribed format, and the vacant data section is known. The known signal generated by the signal generation unit 502 is embedded and output from the output terminal 107.

The configuration of the receiving apparatus according to this embodiment is the same as that shown in FIG.

As described above, according to the present embodiment, in addition to the effects of the first embodiment, the transmitting device is independent of the known signal inserted in the data format according to the preset known signal generation length. Since it is possible to select whether to generate the known signal or to generate the known signal in association with it, adaptive control can be performed.

(Embodiment 4) Embodiment 4 is a combination of Embodiment 2 and Embodiment 3.

FIG. 6 is a block diagram showing the configuration of the transmitting apparatus according to the fourth embodiment. In the transmitter of FIG. 6, the same components as those in FIG. 5 are assigned the same reference numerals as those in FIG. 5 and their explanations are omitted.

Compared to FIG. 5, the transmitter of FIG. 6 has a configuration in which an input terminal 601 for inputting a channel type signal is added. The operation of the known signal generation length holding unit 602 is different from that of the known signal generation length holding unit 501 in FIG.

The known signal generation length holding unit 602 is set with the known signal length to be generated for each channel type, because the type of interleaving varies depending on the type of channel and the empty data section also varies. Then, the known signal generation length holding unit 602 outputs the known signal generation length to the known signal generation unit 502 and the data mapping unit 503 according to the channel type signal input from the input terminal 601.

The configuration of the receiving apparatus according to the present embodiment is the same as that shown in FIG. 4 shown in the second embodiment, and therefore its explanation is omitted.

As described above, according to the present embodiment, both the effects of the second embodiment and the effects of the third embodiment can be obtained.

(Embodiment 5) In Embodiment 5, in the demodulation processing of the receiving device, what is the most effective factor for improving the receiving performance is judged, and the transmitting device is judged based on this judgment result. A case will be described in which a request for mapping a known signal in an empty data section is transmitted.

FIG. 7 is a block diagram showing the configuration of the receiving apparatus according to the fifth embodiment. In the receiving apparatus of FIG. 7, the same components as those in FIG. 2 are assigned the same reference numerals as those in FIG. 2 and description thereof is omitted.

Compared to FIG. 2, the receiving apparatus of FIG. 7 has a configuration in which a reception performance improvement factor determination unit 702, an input terminal 703, a transmission mapping request unit 704, and an output terminal 705 are added. The operation of the demodulation unit 701 is the same as that of the demodulation unit 20 of FIG.
Different from 3.

Demodulation section 701 outputs the data portion of the demodulated signal to deinterleave section 204 and outputs a known signal from output terminal 205. The demodulation unit 701 also outputs the demodulation result indicating the reception performance to the reception performance improvement factor determination unit 702.

Further, the reception performance improvement factor determination unit 702 is
By using the demodulation result indicating the reception performance demodulated by the demodulation unit 701, it is determined what should be followed best when communication is started next time.

The transmission mapping requesting unit 704 generates a signal requested to the transmitting device based on the judgment result of the reception performance improving factor judging unit 702. For example, if the reception performance improvement factor determination unit 702 determines that the demodulation result is bad when the known signal is lengthened to one together with the empty data section, the transmission mapping request unit 704 estimates the transmission device side. Generate a request signal to send the frequency offset information. On the other hand, the reception performance improvement factor determination unit 702
When it is determined that the demodulation result is good in, the transmission mapping requesting unit 704 generates a signal requesting that the known signal be lengthened to one together with the empty data section and sent next time. The quality of the demodulation result is judged by comparison with the threshold value obtained from the experimental value. Then, the transmission mapping requesting unit 704 inserts the generated signal into the input data input from the input terminal 703 and outputs it as a transmission signal from the output terminal 705.

In response to this request, the transmitting device, which has received the signal indicating the request for mapping the known signal, sends the estimated frequency offset as information data in the empty data section or sends the known signal together with the empty data section. Send a long known signal to one.

The configuration of the transmitting apparatus according to the present embodiment is the same as any one of FIGS. 1, 3, 5, and 6 shown in the first to fourth embodiments, and therefore its explanation is omitted.

As described above, according to the present embodiment, the receiving device can request the transmitting device to effectively utilize the empty data section, so that the receiving performance of the receiving device can be surely improved. it can.

In each of the above-mentioned embodiments, frequency offset information, power information, etc. can be embedded instead of the known signal.

[0074]

As described above, according to the present invention,
Since the transmitter transmits the signal in which the known signal is filled in the empty data section and the receiver can use the known signal, it is possible to effectively use the area where the data is not mapped by the interleaving.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a transmission apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a block diagram showing a configuration of a receiving apparatus according to the above embodiment.

FIG. 3 is a block diagram showing a configuration of a transmission apparatus according to Embodiment 2 of the present invention.

FIG. 4 is a block diagram showing a configuration of a receiving apparatus according to the above embodiment.

FIG. 5 is a block diagram showing a configuration of a transmission apparatus according to Embodiment 3 of the present invention.

FIG. 6 is a block diagram showing a configuration of a transmission apparatus according to Embodiment 4 of the present invention.

FIG. 7 is a block diagram showing a configuration of a receiving apparatus according to Embodiment 5 of the present invention.

FIG. 8 is a diagram showing a data format of one slot in GSM.

FIG. 9 is a block diagram showing a configuration of a conventional transmitter.

FIG. 10 is a diagram showing an interleaved arrangement of data.

FIG. 11 is a diagram showing an example of interleave mapping.

[Explanation of symbols]

102 channel coder 103 Interleave section 104, 302, 502 Known signal generator 105 Data assignment detector 106, 303, 503 data mapping section 203, 402, 701 demodulator 204 Deinterleave section 206 channel decoder 501, 602 known signal generation length holding unit 702 Reception performance improvement factor determination unit 704 Transmission mapping request unit

Claims (11)

[Claims] 1. An interleaving means for interleaving data, a known signal generating means for generating a known signal between transmission and reception, and a data assignment detecting means for detecting an empty interval where the interleaved data is not mapped. And a mapping means for mapping the generated known signal to the free space. 2. An interleaving means for interleaving data, a known signal generating means for generating a signal known between transmission and reception according to a channel type, and a generated known signal after interleaving determined by the channel type. A transmission device, comprising: a mapping unit that maps to a section in which data is not mapped. 3. The transmitting apparatus according to claim 1, wherein the known signal generating means generates the known signal in association with the known signal inserted in the data format. 4. The known signal generating means generates a known signal independently of the known signal inserted in the data format or associates the known signal with the known signal inserted in the data format in accordance with the known signal generation length determined in advance by the system. The transmission device according to claim 1 or 2, wherein it is selected whether to generate. 5. A base station apparatus comprising the transmission apparatus according to claim 1. Description: 6. A communication terminal device comprising the transmitting device according to claim 1. Description: 7. A demodulating means for specifying a data section in which a known signal is filled based on a channel and demodulating the known signal and data, and a deinterleaving means for deinterleaving the demodulated data. Characteristic receiving device. 8. A demodulating means for demodulating a known signal and data, a deinterleaving means for deinterleaving the demodulated data, and a factor capable of improving reception performance based on a demodulation result of the demodulating means. A receiving device comprising: a determining means; and a transmission mapping requesting means for requesting a data mapping method to a transmitting device of a communication partner based on the determination result of the determining means. 9. A base station device comprising the receiving device according to claim 7 or 8. 10. A communication terminal device comprising the receiving device according to claim 7. 11. A transmission device interleaves data, generates a signal that is known between transmission and reception, detects an empty interval where the data after interleaving is not mapped, and detects the generated known signal as the empty interval. And the receiver demodulates the known signal and data,
A transmission / reception method characterized by deinterleaving demodulated data.