Virtual full-duplex relay transmission method

Abstract

The invention relates to a virtual full-duplex relay transmission method, which comprises the steps that K source terminals S1, S2, S3,..., SK send signals to a relay R1 in an odd-number time slot (2t-1), a relay R2 performs decoding and re-encoding on signals received in the previous time slot (2t-2) and then forwards the signals to K sink terminals D1, D2,..., DK, the K source terminals S1, S2, S3,..., SK send signals to the relay R2 in an even-number time slot 2t, the relay R1 performs decoding and re-encoding on signals received in the previous time slot (2t-1) and then forwards the signals to the K sink terminals D1, D2,..., DK, the relay R1 and the relay R2 take turns to receive and send signals, the K source terminals S1, S2, S3,..., SK always send signals, the K sink terminals D1, D2,..., DK, always receive signals, thereby realizing the same transmission efficiency with a full-duplex relay method. However, signals are sent and received alternately by using two general half-duplex relay in the method, so that a full-duplex self-interference phenomenon is avoided.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a virtual full-duplex relay transmission method. Background technique [0002] In a wireless communication system, when the distance between the transmitting end and the receiving end is long, the transmitting end needs to consume a large amount of power to maintain normal communication. By introducing a relay terminal between the transmitting end and the receiving end for signal forwarding, this can be done in a certain To reduce the terminal power consumption to a certain extent, this technology is called wireless relay technology. Such as figure 1 As shown, a typical wireless relay system is given, where K (K≥1) source terminals S 1 ,S 2 ,S 3 ... S K With the assistance of the relay terminal R, the signal is sent to the corresponding K sink terminals D 1 ,D 2 ,D 3 ...D K , figure 1 Each source terminal and sink terminal deploys a single antenna, and th...

AI Technical Summary

Problems solved by technology

The source terminal always sends signals to the relay R, and the relay R adopts the full-duplex mode. While receiving the signal from the source terminal, the signal received in the previous time slot is processed and then sent to the sink terminal, and the sink terminal Then it has been receiving the forwarding signal from the relay terminal. Compared with the traditional half-duplex relay, this kind of full-duplex relay transmission has effectively improved the transmission efficiency, but the full-duplex relay terminal also has certain disadvantages, that is, there are serious Self-interference phenomenon, and the current existing technology uses analog or digital interference cancellation technology, which is very complicated and causes high hardware cost and implementation complexity

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