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A method of communication

A communication method and signal technology, applied in the field of communication, can solve the problems of inability to receive and transmit signals at the same time, loss of spectral efficiency, etc., and achieve the effects of performance improvement, low bit error rate, and noise elimination.

Inactive Publication Date: 2012-12-26
AGENCY FOR SCI TECH & RES
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  • Claims
  • Application Information

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Problems solved by technology

However, the mentioned relay protocol suffers from spectral efficiency loss due to the need to use dual channels for transmission and reception at the relay node
In other words, because half-duplex (HD) relays cannot receive and transmit signals at the same time, additional time, frequency and / or code resources are required

Method used

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Examples

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Embodiment Construction

[0054] The following symbols may be used in this manual. For vectors or matrices, the superscripts 'T' and '*' denote transpose and complex conjugate transpose, respectively. For a scalar w, the notation |w| denotes the absolute value of w. For matrix W, the notation ||W|| F Denotes the Frobinis norm of W. 0 w represents a w by w zero matrix, and I w Represents the w by w identity matrix. Mark W -1 Represents the inverse matrix of matrix W. [W] l，l Represents the lth diagonal element of W. E[·] represents the expected value of the random variable.

[0055] figure 1 The diagram illustrates a transmitting method 100 according to an exemplary embodiment. The transmission uses dual-path dual space-time transmit diversity (DSTTD) and occurs from source S 102 to destination D 120 via relay stations R1 110 and R2 112 . Relay stations R1 110 and R2 112 may relay in a decode-and-forward (DF) manner. The use of DF may have the advantage of reducing or eliminating the noise co...

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Abstract

A method of communication comprising: at time=t: a first multiple antenna relay node decoding and forwarding a first STBC coded signal from a source node, and a first decoded and forwarded STBC signal from a second multiple antenna relay node, and a destination DSTTD receiver decoding the first STBC coded signal from the source node, and the first decoded and forwarded STBC signal from the second multiple antenna relay node; at time=t+1 : the second multiple antenna relay node receiving a second STBC coded signal from the source node, and a second decoded and forwarded signal from the first multiple antenna relay node, and the destination DSTTD receiver decoding the second STBC coded signal from the source node, and the second decoded and forwarded signal from the first multiple antenna relay node.

Description

technical field [0001] The present invention relates to a communication method. Background technique [0002] In point-to-point (PtoP) communication, there is a limitation on the transmit power of the transmitter due to the cost and complexity of the radio frequency (RF) chain including many amplifiers, filters, and digital-to-analog converters. To enhance communication performance in these situations, multiple transmitters with low power cooperation have been considered as candidates for future communication. Examples of such cooperative communication protocols with relays are physical layer network coding, analog network coding, and various hybrid approaches. However, the mentioned relay protocols suffer from spectral efficiency loss due to the need to use dual channels for transmission and reception at the relay node. In other words, since half-duplex (HD) relays cannot simultaneously receive and transmit signals, additional time, frequency and / or code resources are req...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/54H04B7/15
CPCH04B7/0669H04B7/0673H04W40/06H04L1/0643H04B7/2606H04L1/0077H04L1/0668H04L2001/0097H04B7/2656
Inventor 郑镇坤孙素梅
Owner AGENCY FOR SCI TECH & RES
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