CN101854196A - Cooperation relay communication system and method based on coding and modulation - Google Patents
Cooperation relay communication system and method based on coding and modulation Download PDFInfo
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- CN101854196A CN101854196A CN200910130287A CN200910130287A CN101854196A CN 101854196 A CN101854196 A CN 101854196A CN 200910130287 A CN200910130287 A CN 200910130287A CN 200910130287 A CN200910130287 A CN 200910130287A CN 101854196 A CN101854196 A CN 101854196A
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Abstract
The invention relates to cooperation relay communication system and method based on coding and modulation. The system comprises a base station, a subordinate relay station and a terminal. The method comprises the steps of: sending modulated data to the subordinate relay station by the base station during first transmission; and sending the modulated data to the terminal during second transmission, and sending the modulated data to the terminal by the subordinate relay station, wherein modulation modes of the data transmitted from the subordinate relay and the base station to the terminal are different.
Description
Technical field
The present invention relates to a kind of wireless mobile telecommunication technology.
Background technology
The radio communication development so far, people improve constantly different with the first generation, the second generation wireless communication system of main transmission speech business to the requirement of wireless transmission data speed and service quality, the third generation and the 4th generation wireless communication system also with the multimedia broad band data service of supporting rate up to 100Mbps-1Gbps, the new technology of therefore seek further to enlarge channel capacity, improving communication quality is domestic and international academia, industrial circle question of common concern.
The multipath fading characteristic that wireless channel has is to hinder the one of the main reasons that channel capacity increases and serve quality improvement.Diversity technique can merge the independent sample of signal that declines of a plurality of experience at receiving terminal, with the decline in the antagonism wireless channel by launch a plurality of sample of signal at transmitting terminal.Common diversity mode mainly contains time diversity, frequency diversity and spatial domain diversity, and wherein the spatial domain diversity technique is because extra holding time and bandwidth resources, and can combine with other diversity modes, thereby more attractive.The spatial domain diversity is also referred to as antenna diversity, and its basic thought is to utilize transmit sample or a plurality of received signal sample (a plurality of incoherent channel) of separate on the space a plurality of to resist multipath fading.The multiple-input and multiple-output of Ti Chuing (MIMO) antenna technology by settling a plurality of antennas simultaneously at receiving terminal and transmitting terminal, forms the mimo channel structure, thereby has made full use of the spatial domain resource in recent years, has increased substantially channel capacity.
Although the MIMO multi-antenna technology has remarkable advantages, and adopted by the popular protocol of new generation of wireless communication system gradually, but still existing problems.Specifically, existing many antennas all are arranged on the base station end, and portable terminal then is difficult to settle many antennas.This mainly contains the reason of two aspects: (1) portable terminal to the requirement of volume, quality and power consumption more than the base station harshness many; (2) desirable MIMO multiaerial system requires the spacing between the adjacent antenna will be much larger than the electric wave wavelength, and the transmission channel between a plurality of dual-mode antennas be independently (or being incoherent at least) and portable terminal because volume restrictions can't be accomplished this point at all.For this reason, the researcher has proposed the notion of equivalent aerial battle array and Wearable antenna on the one hand, then is devoted to study the Design of Signal under the correlated channels on the other hand.Yet these solutions produce little effect! Actual obtainable channel capacity is had a greatly reduced quality than ideal value, and desirable MIMO multi-antenna technology is had difficulty in walking in practice.
In order to break this deadlock, people such as Sendonaris have proposed a kind of new spatial domain diversity technique, and promptly collaboration diversity makes the portable terminal of single antenna also can realize the spatial domain diversity.Its basic thought is that each portable terminal in the system all has one or more affiliates, has a responsibility between the affiliate helping its partner to transmit information in the own information of transmission.Like this, each terminal has not only been utilized oneself but also has utilized affiliate's space channel in the process of transmission information, thereby has obtained certain space diversity gain.Existing result of study shows: under flat fading environment, collaboration diversity can enlarge power system capacity, improves network service quality, improves systematic function.Because the affiliate in the collaboration diversity shares antenna each other, thereby has constituted virtual MIMO multiaerial system, in this sense, collaboration diversity moves towards the practical new approach that provides for the MIMO multi-antenna technology.
Collaboration diversity is a brand-new research field, has caused people's attention at home and abroad.The thought of collaboration diversity has boundless application prospect, can be applicable to multiple occasions such as cell mobile communication systems, wireless Ad hoc network, WLAN (wireless local area network) and wireless sensor network.
Because the deterioration that the time variation of multipath fading and wireless channel brings receptivity can not be ignored.Diversity technique can be by merging the independent sample of signal that declines of a plurality of experience with the decline in the antagonism wireless channel at receiving terminal.One of effective means of collaboration communication balance decline, collaboration communication mainly is divided into according to signal processing mode: amplify relaying, decoding relaying, several modes of coding cooperative, at present, space-time code cooperation is a kind of main cooperating relay means of communication, typically be exactly the Alamouti emission diversity scheme, still, these methods mainly all are the diversity at the space, and will not encode and modulation is taken into account, can not further improve the systematic function of cooperating relay.
Summary of the invention
The objective of the invention is coding communicated by letter with cooperating relay with modulation combines, thereby further improves the performance of system.
According to an aspect of the present invention, provide a kind of based on the cooperating relay communication means in the cooperating relay communication system of coding and modulation, described system comprises base station, dependent repeater station and terminal, described method comprises step: in transmission for the first time, the base station will send to dependent repeater station through the data of ovennodulation; In transmission for the second time, the base station will send to terminal through the data of ovennodulation, and dependent repeater station will send to terminal through the data of ovennodulation, and wherein, the modulation system of data that sends to terminal from described dependent repeater station and base station is different.
According to a further aspect in the invention, a kind of cooperating relay communication system based on coding and modulation, described system comprises: the base station, in transmission for the first time, to send to dependent repeater station through the data of ovennodulation, in transmission for the second time, will send to terminal through the data of ovennodulation; Dependent repeater station in transmission for the second time, will send to terminal through the data of ovennodulation; Terminal receives the data through ovennodulation from described dependent repeater station and base station, wherein, the modulation system of the data that send from described dependent repeater station and base station is different.
Description of drawings
Fig. 1 illustrates the cooperating relay communication system according to exemplary embodiment of the present invention;
Fig. 2 is the diagrammatic sketch that the cooperating relay communication system of carrying out collaboration communication according to the single dependent repeater station and the base station based on the decoding forwarding of exemplary embodiment of the present invention is shown;
Fig. 3 is the block diagram that illustrates according to the base station in the cooperating relay communication system shown in Figure 2 of exemplary embodiment of the present invention;
Fig. 4 is the block diagram that illustrates according to the dependent repeater station in the cooperating relay communication system shown in Figure 2 of exemplary embodiment of the present invention;
Fig. 5 is the diagrammatic sketch that the cooperating relay communication system of carrying out collaboration communication according to the single dependent repeater station and the base station based on the amplification forwarding of exemplary embodiment of the present invention is shown;
Fig. 6 is the block diagram that illustrates according to the base station in the cooperating relay communication system shown in Figure 5 of exemplary embodiment of the present invention;
Fig. 7 is the block diagram that illustrates according to the dependent repeater station in the cooperating relay communication system shown in Figure 5 of exemplary embodiment of the present invention;
Fig. 8 is the diagrammatic sketch that the cooperating relay communication system of carrying out collaboration communication according to the many relay stations and the base station of exemplary embodiment of the present invention is shown;
Fig. 9 is the block diagram that illustrates according to the base station in the cooperating relay communication system shown in Figure 8 of exemplary embodiment of the present invention;
Figure 10 is the block diagram that illustrates according to the dependent repeater station 1 in the cooperating relay communication system shown in Figure 8 of exemplary embodiment of the present invention;
Figure 11 is the block diagram that illustrates according to the dependent repeater station 2 in the cooperating relay communication system shown in Figure 8 of exemplary embodiment of the present invention;
Figure 12 is the diagrammatic sketch that the cooperating relay communication system of carrying out collaboration communication according to the many relay stations and the base station of another exemplary embodiment of the present invention is shown;
Figure 13 is the block diagram that illustrates according to the base station in the cooperating relay communication system shown in Figure 12 of another exemplary embodiment of the present invention;
Figure 14 is the block diagram that illustrates according to the dependent repeater station 1 in the cooperating relay communication system shown in Figure 12 of another exemplary embodiment of the present invention;
Figure 15 is the block diagram that illustrates according to the dependent repeater station 2 in the cooperating relay communication system shown in Figure 12 of another exemplary embodiment of the present invention;
Figure 16 is the diagrammatic sketch that the cooperating relay communication system of carrying out collaboration communication according to the many relay stations and the base station of another exemplary embodiment of the present invention is shown;
Figure 17 is the block diagram that illustrates according to the base station in the cooperating relay communication system shown in Figure 16 of another exemplary embodiment of the present invention;
Figure 18 is the block diagram that illustrates according to the dependent repeater station 1 in the cooperating relay communication system shown in Figure 16 of another exemplary embodiment of the present invention; And
Figure 19 is the block diagram that illustrates according to the dependent repeater station 2 in the cooperating relay communication system shown in Figure 16 of another exemplary embodiment of the present invention.
Embodiment
In accompanying drawing of the present invention, 1. be expressed as transmission for the first time, 2. be expressed as transmission for the second time.
Fig. 1 illustrates the cooperating relay communication system according to exemplary embodiment of the present invention.
With reference to Fig. 1, the cooperating relay communication system is by base station or senior relay station control.Solid line is represented first kind of modulation system, and dotted line is represented second kind of modulation system, and the real point line is represented the third modulation system.
The base station of Miao Shuing can be replaced by senior relay station in the following embodiments.
In transmission for the first time, the base station sends the data to dependent repeater station.Described data can be (A, B), (A, B, Y1, Y2) or (A, B, W1, W2).Wherein, ((Y1 is Y2) with (W1, W2) expression check bit for A, B) expression information bit.And in transmission for the first time, employing be with a kind of modulation system.That is to say that in transmission for the first time, the base station sends the data that adopt identical modulation system to dependent repeater station.
In transmission for the second time, dependent repeater station and base station send data to terminal simultaneously, wherein, the data that the base station sends can be (A, B), (A, B, Y1, Y2) or (A, B, W1, W2).If dependent repeater station has the decoding forwarding capability, then the data that send of dependent repeater station can be (A, B), (A, B, Y1, Y2), (A, B, W1, W2), (Y1, Y2) or (W1, W2).And in transmission for the second time, dependent repeater station sends the data that adopt different modulation systems to modulate with base station (perhaps senior relay station) to different terminals.That is to say that in transmission for the second time, each terminal is inequality from the modulation system that relay station and base station (the perhaps senior relay station) of subordinate receives data.Terminal is carried out the demodulation merging with the data bit information that receives and then is sent in the decoder, to carry out subsequent treatment.
Fig. 2 is the diagrammatic sketch that the cooperating relay communication system of carrying out collaboration communication according to the single dependent repeater station and the base station based on the decoding forwarding of exemplary embodiment of the present invention is shown.
With reference to Fig. 2, at first, in transmission for the first time, (for example, information bit (A, B)) is encoded to data in the base station.Coded data (A, B, Y
1, Y
2, W
1, W
2) by card punch, described card punch is removed the data bit that does not need to transmit and (for example, removed check bit (W
1, W
2)), to improve code rate.The data (A, B, the Y that comprise information bit and check bit from card punch output
1, Y
2).Then, modulator utilizes first modulation system to data (A, B, Y
1, Y
2) modulate.
Dependent repeater station receives data (A, B, Y
1, Y
2), and the demodulation module by dependent repeater station and decoder module (A B) extracts, again with information bit (A, B) recompile with information bit.(A B) becomes (A, B, Y behind the encoder recompile by dependent repeater station to information bit
1, Y
2, W
1, W
2), then by card punch, described card punch is used to remove the bit that does not need to transmit and (for example, removes check bit (Y
1, Y
2)), to improve code rate.Obtain comprising data (A, B, the W of information bit and check bit at last
1, W
2).Then, the modulator of dependent repeater station uses (A, B, the W of second modulation system to obtaining through card punch
1, W
2) modulate.
In transmission for the second time, base station (perhaps senior relay station) will utilize the data after the modulation of first modulation system to send to terminal, and dependent repeater station will utilize the data after second modulation system is modulated to send to terminal simultaneously.Terminal demodulates (A, B, Y respectively after receiving these two groups of data
1, Y
2) and (A, B, W
1, W
2), carry out bit level merging then, the value that will merge is sent in the decoder of terminal at last, to carry out subsequent treatment.
Fig. 3 is the block diagram that illustrates according to the base station in the cooperating relay communication system shown in Figure 2 of exemplary embodiment of the present invention.
With reference to Fig. 3, base station (BS) comprises encoder, first card punch, first modulator and transmitter.Described encoder can be CTC (convolution turbo) encoder.
(for example, encode by information bit (A, B)) to data for encoder.Specifically, obtain having data (A, B, the Y of check bit after encoding by the CTC encoder
1, Y
2, W
1, W
2).Data (A, B, Y
1, Y
2, W
1, W
2) by first card punch, first card punch is used to remove the data bit that does not need to transmit and (has promptly removed check bit (W
1, W
2)), to improve code rate.The data (A, B, the Y that comprise information bit and check bit from the output of first card punch
1, Y
2).Then, first modulator utilizes first modulation system to data (A, B, Y
1, Y
2) modulate.Data after transmitter will be modulated utilize multi-antenna technology to send.In detail, first modulator can be mapped on the modulation constellation points by square high-order orthogonal amplitude modulation(PAM) (QAM) planisphere mapped mode 1, at last with these constellation point by orthogonal multiple carrier modulation (OFDM) after, utilize multi-antenna technology to send.
Fig. 4 is the block diagram that illustrates according to the dependent repeater station in the cooperating relay communication system shown in Figure 2 of exemplary embodiment of the present invention.
With reference to Fig. 4, dependent repeater station (RS) comprises demodulator, decoder, encoder, second card punch, second modulator and transmitter.Described encoder can be a convolution turbo encoder.
After dependent repeater station received modulated data from the base station, demodulator carried out demodulation to it, and the data of decoder after to demodulation are decoded then, obtain information bit (A, B).(for example, encode by information bit (A, B)) to data for encoder.Specifically, obtain having data (A, B, the Y of check bit after encoding by the CTC encoder
1, Y
2, W
1, W
2).Data (A, B, Y
1, Y
2, W
1, W
2) by second card punch, second card punch is used to remove does not need the data bit (that is check bit (Y, that transmits
1, Y
2)), to improve code rate.The data (A, B, the W that comprise information bit and check bit from the output of second card punch
1, W
2), then, second modulator utilizes second modulation system to data (A, B, W
1, W
2) modulate.Data after transmitter will be modulated utilize multi-antenna technology to send.In detail, second modulator is mapped on the modulation constellation points by qam constellation figure mapped mode 2, at last with these constellation point by behind the OFDM, utilize multi-antenna technology to send.
Fig. 5 is the diagrammatic sketch that the cooperating relay communication system of carrying out collaboration communication according to the single dependent repeater station and the base station based on the amplification forwarding of exemplary embodiment of the present invention is shown.
With reference to Fig. 5, in transmission for the first time, (for example, information bit (A, B)) is encoded to data in the base station.Specifically, obtain having data (A, B, the Y of check bit after encoding by the CTC encoder
1, Y
2, W
1, W
2).Coded data (A, B, Y
1, Y
2, W
1, W
2) by second card punch, second card punch is used to remove the data bit that does not need to transmit and (for example, removes check bit (Y
1, Y
2)), to improve code rate.The data (A, B, the W that comprise information bit and check bit from the output of second card punch
1, W
2).Then, second modulator utilizes second modulation system to data (A, B, W
1, W
2) modulate.Dependent repeater station receives data (A, B, W
1, W
2), but only to data (A, B, W
1, W
2) amplify to transmit and handle.
In transmission for the second time, (for example, information bit (A, B)) is encoded to data in the base station.Coded data (A, B, Y
1, Y
2, W
1, W
2) by first card punch, first card punch is used to remove the data bit that does not need to transmit and (for example, removes check bit (W
1, W
2)), to improve code rate.The data (A, B, the Y that comprise information bit and check bit from the output of first card punch
1, Y
2).Then, first modulator utilizes first modulation system to data (A, B, Y
1, Y
2) modulate.The base station will utilize the data after first modulation system is modulated to send to terminal, and dependent repeater station will send to terminal through the data of above-mentioned processing and amplifying.Terminal demodulates (A, B, Y respectively after receiving these two groups of data
1, Y
2) and (A, B, W
1, W
2), carry out bit level merging then, the value that will merge is sent in the decoder at last, to carry out subsequent treatment.
Fig. 6 is the block diagram that illustrates according to the base station in the cooperating relay communication system shown in Figure 5 of exemplary embodiment of the present invention.
With reference to Fig. 6, the base station comprises encoder, first card punch, second card punch, first modulator, second modulator, first transmitter and second transmitter.Described encoder can be a convolution turbo encoder.
In transmission for the first time, (for example, encode by information bit (A, B)) to data for encoder.Specifically, obtain having data (A, B, the Y of check bit after encoding by the CTC encoder
1, Y
2, W
1, W
2).Data (A, B, Y
1, Y
2, W
1, W
2) by second card punch.The data (A, B, the W that comprise information bit and check bit from the output of second card punch
1, W
2), then, second modulator utilizes second modulation system to data (A, B, W
1, W
2) modulate.Data after second transmitter will be modulated utilize multi-antenna technology to send to dependent repeater station.In detail, second modulator is mapped on the modulation constellation points by QAM modulation constellation mapped mode 2, at last with these constellation point by behind the OFDM, utilize multi-antenna technology to send again.
In transmission for the second time, (A's encoder B) encodes, and obtains having data (A, B, the Y of check bit to information bit
1, Y
2, W
1, W
2).Data (A, B, Y
1, Y
2, W
1, W
2) by first card punch.The data (A, B, the Y that comprise information bit and check bit from the output of first card punch
1, Y
2), then, first modulator utilizes first modulation system to data (A, B, Y
1, Y
2) modulate.Data after first transmitter will be modulated utilize multi-antenna technology to send to terminal.In detail, first modulator can be mapped on the modulation constellation points by square high-order orthogonal amplitude modulation(PAM) (QAM) planisphere mapped mode 1, at last with these constellation point by behind the OFDM, utilize multi-antenna technology to send again.
Fig. 7 is the block diagram that illustrates according to the dependent repeater station in the cooperating relay communication system shown in Figure 5 of exemplary embodiment of the present invention.
With reference to Fig. 7, dependent repeater station comprises amplifier and transmitter.
Amplifier amplifies the data that receive from the base station, utilizes multi-antenna technology to send to terminal again.
In the cooperating relay communication system that collaboration communication is carried out in the single dependent repeater station of transmitting based on amplification and the base station of another exemplary embodiment, in transmission for the first time, the base station will be through the check bit (W of second modulation system modulation
1, W
2) send to dependent repeater station.In transmission for the second time, the base station will be through (A, B, the Y of first modulation system modulation
1, Y
2) sending to terminal, dependent repeater station is only to the check bit (W after the modulation
1, W
2) amplify, re-send to terminal.
Fig. 8 is the diagrammatic sketch that the cooperating relay communication system of carrying out collaboration communication according to the many relay stations and the base station of exemplary embodiment of the present invention is shown.
With reference to Fig. 8, in transmission for the first time, (A B) is encoded to data (A, B, Y with information bit in the base station
1, Y
2, W
1, W
2).Data (A, B, Y
1, Y
2, W
1, W
2) by the card punch of base station, described card punch is removed does not need information transmitted bit and check bit, obtains check bit (Y
1, Y
2).Then, the base station utilizes first modulation system to check bit (Y
1, Y
2) modulate, the data after will modulating again send to dependent repeater station 1 (RS1).In detail, first modulator of base station can be mapped on the modulation constellation points by square high-order orthogonal amplitude modulation(PAM) (QAM) planisphere mapped mode 1, at last with these constellation point by behind the OFDM, utilize multi-antenna technology to send again.Simultaneously, data (A, B, Y
1, Y
2, W
1, W
2) by another card punch of base station, described another card punch is removed and do not needed information transmitted bit and check bit, obtains check bit (W
1, W
2).Then, the base station utilizes second modulation system to check bit (W
1, W
2) modulate, the data after will modulating again send to dependent repeater station 2 (RS2).In detail, second modulator of base station is mapped on the modulation constellation points by QAM modulation constellation mapped mode 2, at last with these constellation point by behind the OFDM, utilize multi-antenna technology to send again.
In transmission for the second time, if RS1 receives check bit (Y from the base station
1, Y
2), then RS1 is with check bit (Y
1, Y
2) directly be forwarded to terminal, perhaps with check bit (Y
1, Y
2) after amplifying, send to terminal.If RS2 receives check bit (W from the base station
1, W
2), then RS2 is with check bit (W
1, W
2) directly be forwarded to terminal, perhaps with check bit (W
1, W
2) after amplifying, send to terminal.Send check bit (Y at RS1 to terminal
1, Y
2) and send check bit (W at RS2 to terminal
1, W
2) time, the base station will (A B) sends to terminal through the information bit of the 3rd modulator.After terminal receives these three groups of data then, demodulate respectively (A, B), (Y
1, Y
2) and (W
1, W
2), send into then in the decoder of terminal and decode, to carry out subsequent treatment.
Fig. 9 is the block diagram that illustrates according to the base station in the cooperating relay communication system shown in Figure 8 of exemplary embodiment of the present invention.
With reference to Fig. 9, the base station comprises encoder, the 3rd card punch, the 4th card punch, first modulator, second modulator, the 3rd modulator, first transmitter, second transmitter and the 3rd transmitter.Described encoder can be a convolution turbo encoder.
In transmission for the first time, (for example, encode by information bit (A, B)) to data for encoder.Specifically, obtain having data (A, B, the Y of check bit after encoding by the CTC encoder
1, Y
2, W
1, W
2).Data (A, B, Y
1, Y
2, W
1, W
2) by the 3rd card punch, the 3rd card punch is removed does not need information transmitted bit and check bit, obtains check bit (Y
1, Y
2).Then, first modulator utilizes first modulation system to check bit (Y
1, Y
2) modulate.Data after first transmitter will be modulated send to dependent repeater station 1 (RS1).
Simultaneously, data (A, B, Y
1, Y
2, W
1, W
2) by the 4th card punch, the 4th card punch is removed does not need information transmitted bit and check bit, obtains check bit (W
1, W
2).Then, second modulator utilizes second modulation system to check bit (W
1, W
2) modulate.Data after second transmitter will be modulated send to dependent repeater station 2 (RS2).
In transmission for the second time, (A B) modulates the 3rd modulator to information bit.Data after the 3rd transmitter will be modulated send to terminal.
Figure 10 is the block diagram that illustrates according to the dependent repeater station 1 in the cooperating relay communication system shown in Figure 8 of exemplary embodiment of the present invention.
Dependent repeater station 1 (RS1) comprises transmitter.
RS1 receives the check bit (Y through the modulation of first modulation system from the base station
1, Y
2), then, transmitter directly is forwarded to terminal with it.
RS1 can also comprise amplifier.In this case, the data after transmitter will amplify send to terminal.
Figure 11 is the block diagram that illustrates according to the dependent repeater station 2 in the cooperating relay communication system shown in Figure 8 of exemplary embodiment of the present invention.
Dependent repeater station 2 (RS2) comprises transmitter.
RS2 receives the check bit (W through the modulation of second modulation system from the base station
1, W
2), then, transmitter directly is forwarded to terminal with it.
RS2 can also comprise amplifier.In this case, the data after transmitter will amplify send to terminal.
Figure 12 is the diagrammatic sketch that the cooperating relay communication system of carrying out collaboration communication according to the many relay stations and the base station of another exemplary embodiment of the present invention is shown.
In transmission for the first time, directly (A B) sends to RS1 and RS2 with information bit in the base station.
In transmission for the second time, (A's RS1 B) encodes, and obtains coded data (A, B, Y to the information bit that receives earlier
1, Y
2, W
1, W
2).Data (A, B, Y
1, Y
2, W
1, W
2) by the card punch of RS1, described card punch is removed does not need information transmitted bit and check bit, obtains check bit (Y
1, Y
2).Then, utilize first modulation system to check bit (Y
1, Y
2) modulate, the data after will modulating again send to terminal.Earlier (A's RS2 B) encodes, and obtains coded data (A, B, Y to the information bit that receives
1, Y
2, W
1, W
2).Data (A, B, Y
1, Y
2, W
1, W
2) by the card punch of RS2, described card punch is removed does not need information transmitted bit and check bit, obtains check bit (W
1, W
2).Utilize second modulation system to check bit (W
1, W
2) modulate, the data after will modulating again send to terminal.Simultaneously, the base station will (A B) sends to terminal through the information bit of the 3rd modulator.After terminal receives these three groups of data then, demodulate respectively (A, B), (Y
1, Y
2) and (W
1, W
2), send into then in the decoder of terminal and decode, to carry out subsequent treatment.
Figure 13 is the block diagram that illustrates according to the base station in the cooperating relay communication system shown in Figure 12 of another exemplary embodiment of the present invention.
The base station comprises the 3rd modulator, first transmitter and second transmitter.
In transmission for the first time, directly (A B) sends to RS1 and RS2 to first transmitter with information bit.
In transmission for the second time, (A B) modulates the 3rd modulator to information bit.Data after second transmitter will be modulated send to terminal.
Figure 14 is the block diagram that illustrates according to the dependent repeater station 1 in the cooperating relay communication system shown in Figure 12 of another exemplary embodiment of the present invention.
Dependent repeater station 1 (RS1) comprises encoder, card punch, first modulator and transmitter.Described encoder can be a convolution turbo encoder.
(for example, encode by information bit (A, B)) to data for encoder.Specifically, obtain having data (A, B, the Y of check bit after encoding by the CTC encoder
1, Y
2, W
1, W
2).Data (A, B, Y
1, Y
2, W
1, W
2) by card punch, described card punch is removed does not need information transmitted bit and check bit, obtains check bit (Y
1, Y
2).Then, first modulator utilizes first modulation system to check bit (Y
1, Y
2) modulate.Data after transmitter will be modulated send to terminal.
Figure 15 is the block diagram that illustrates according to the dependent repeater station 2 in the cooperating relay communication system shown in Figure 12 of another exemplary embodiment of the present invention.
Dependent repeater station 2 (RS2) comprises encoder, card punch, second modulator and transmitter.Described encoder can be a convolution turbo encoder.
(for example, encode by information bit (A, B)) to data for encoder.Specifically, obtain having data (A, B, the Y of check bit after encoding by the CTC encoder
1, Y
2, W
1, W
2).Data (A, B, Y
1, Y
2, W
1, W
2) by card punch, described card punch is removed does not need information transmitted bit and check bit, obtains check bit (W
1, W
2).Second modulator utilizes second modulation system to check bit (W
1, W
2) modulate.Data after transmitter will be modulated send to terminal.
Figure 16 is the diagrammatic sketch that the cooperating relay communication system of carrying out collaboration communication according to the many relay stations and the base station of another exemplary embodiment of the present invention is shown.
In transmission for the first time, the base station will (A B) sends to RS1 and RS2 through the information bit of the 3rd modulator.
In transmission for the second time, RS1 carries out demodulation to the data that receive earlier, and (A B), encodes to it again, obtains coded data (A, B, Y to obtain information bit
1, Y
2, W
1, W
2).Data (A, B, Y
1, Y
2, W
1, W
2) by the card punch of RS1, described card punch is removed does not need information transmitted bit and check bit, obtains check bit (Y
1, Y
2).Then, utilize first modulation system to check bit (Y
1, Y
2) modulate, the data after will modulating again send to terminal.RS2 carries out demodulation to the data that receive earlier, and (A B), encodes to it again, obtains coded data (A, B, Y to obtain information bit
1, Y
2, W
1, W
2).Data (A, B, Y
1, Y
2, W
1, W
2) by the card punch of RS2, described card punch is removed does not need information transmitted bit and check bit, obtains check bit (W
1, W
2).Utilize second modulation system to check bit (W
1, W
2) modulate, the data after will modulating again send to terminal.Simultaneously, the base station will (A B) sends to terminal through the information bit of the 3rd modulator.After terminal receives these three groups of data then, demodulate respectively (A, B), (Y
1, Y
2) and (W
1, W
2), send into then in the decoder of terminal and decode.
Figure 17 is the block diagram that illustrates according to the base station in the cooperating relay communication system shown in Figure 16 of another exemplary embodiment of the present invention.
The base station comprises the 3rd modulator and transmitter.
In transmission for the first time, (A B) modulates the 3rd modulator to information bit.Data after transmitter will be modulated send to RS1 and RS2.
In transmission for the second time, transmitter will (A B) sends to terminal through the information bit of the 3rd modulator.
Figure 18 is the block diagram that illustrates according to the dependent repeater station 1 in the cooperating relay communication system shown in Figure 16 of another exemplary embodiment of the present invention.
Dependent repeater station 1 (RS1) comprises demodulator, encoder, card punch, first modulator and transmitter.Described encoder can be a convolution turbo encoder.
Demodulator earlier carries out demodulation to the data that receive from the base station, obtain information bit (A, B).(A's encoder B) encodes to information bit again.Specifically, obtain having data (A, B, the Y of check bit after encoding by the CTC encoder
1, Y
2, W
1, W
2).Data (A, B, Y
1, Y
2, W
1, W
2) by card punch, described card punch is removed does not need information transmitted bit and check bit, obtains check bit (Y
1, Y
2).First modulator utilizes first modulation system to check bit (Y
1, Y
2) modulate.Data after transmitter will be modulated send to terminal.
Figure 19 is the block diagram that illustrates according to the dependent repeater station 2 in the cooperating relay communication system shown in Figure 16 of another exemplary embodiment of the present invention.
Dependent repeater station 2 (RS2) comprises demodulator, encoder, card punch, second modulator and transmitter.Described encoder can be a convolution turbo encoder.
Demodulator earlier carries out demodulation to the data that receive from the base station, obtain information bit (A, B).(A's encoder B) encodes to information bit again.Specifically, obtain having data (A, B, the Y of check bit after encoding by the CTC encoder
1, Y
2, W
1, W
2).Data (A, B, Y
1, Y
2, W
1, W
2) by card punch, described card punch is removed does not need information transmitted bit and check bit, obtains check bit (W
1, W
2).Second modulator utilizes second modulation system to check bit (W
1, W
2) modulate.Data after transmitter will be modulated send to terminal.
The present invention communicates by letter with modulation coding and combines with cooperating relay, thereby further improves the performance of system.And thereby the present invention is shone upon combine acquisition coding and modulation gain with CTC coding and planisphere.
Scope of the present invention is not limited to above-mentioned exemplary embodiment, and the mode that those skilled in the art can expect by above-mentioned instruction is also contained in protection scope of the present invention.
Claims (12)
- One kind based on the coding and the modulation the cooperating relay communication system in the cooperating relay communication means, described system comprises base station, dependent repeater station and terminal, described method comprises step:In transmission for the first time, the base station will send to dependent repeater station through the data of ovennodulation;In transmission for the second time, the base station will send to terminal through the data of ovennodulation, and dependent repeater station will send to terminal through the data of ovennodulation,Wherein, it is different to send to the modulation system of data of terminal from described dependent repeater station and base station.
- 2. cooperating relay communication means as claimed in claim 1 is characterized in that described dependent repeater station has the decoding forwarding capability.
- 3. cooperating relay communication means as claimed in claim 2 is characterized in that the base station sends to the dependent repeater station step with data and comprises when described dependent repeater station has the decoding forwarding capability:Data are encoded;Remove and not need the data transmitted;Remaining data are modulated.
- 4. cooperating relay communication means as claimed in claim 3 is characterized in that dependent repeater station comprises the step that data send to terminal when described dependent repeater station has the decoding forwarding capability:The data that receive are carried out the demodulation sign indicating number;Decoded data are carried out recompile;Remove and not need the data transmitted;Remaining data is modulated, and modulation system is different with the modulation system of the data that receive.
- 5. cooperating relay communication means as claimed in claim 1 is characterized in that described dependent repeater station has the amplification forwarding capability.
- 6. cooperating relay communication means as claimed in claim 5 is characterized in that modulate data with different modulation systems the base station, re-sends to dependent repeater station and base station when described dependent repeater station has the forwarding capability of amplification.
- One kind based on the coding and the modulation the cooperating relay communication system, described system comprises:The base station is used for will sending to dependent repeater station through the data of ovennodulation in transmission for the first time, and will sending to terminal through the data of ovennodulation in the transmission for the second time;Dependent repeater station is used for will sending to terminal through the data of ovennodulation in transmission for the second time;Terminal is used for receiving from described dependent repeater station and base station the data through ovennodulation;Wherein, the modulation system of the data that send from described dependent repeater station and base station is different.
- 8. cooperating relay communication system as claimed in claim 7 is characterized in that described dependent repeater station has the decoding forwarding capability.
- 9. cooperating relay communication system as claimed in claim 8 is characterized in that described base station comprises when described dependent repeater station has the decoding forwarding capability:Encoder is used for data are encoded;Card punch, being used to remove does not need the data transmitted;First modulator is used for remaining data are modulated.
- 10. cooperating relay communication system as claimed in claim 9 is characterized in that described dependent repeater station comprises when described dependent repeater station has the decoding forwarding capability:Demodulator is used for the data that receive are carried out demodulation;Decoder is used for demodulated data is decoded;Encoder is used for decoded data are carried out recompile;Card punch, being used to remove does not need the data transmitted;Second modulator is used for remaining data is modulated,Wherein, the described second modulators modulate mode is different with the modulation system of described first modulator.
- 11. cooperating relay communication system as claimed in claim 7 is characterized in that described dependent repeater station has the amplification forwarding capability.
- 12. cooperating relay communication system as claimed in claim 11 is characterized in that modulate data with different modulation systems described base station, re-sends to described dependent repeater station and base station when described dependent repeater station has the forwarding capability of amplification.
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Cited By (1)
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| CN102098132A (en) * | 2010-10-28 | 2011-06-15 | 南京邮电大学 | Wireless cooperative relay network-based hierarchical random network coding method |
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