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Direct Sequence Spread Spectrum (DSSS) signal has been widely used because of its low signal-to-noise ratio, strong anti-interference, low interception rate and multi-path effect. It is gradually replacing the traditional communications, and widely used in modern military and commercial communications systems. Therefore, the corresponding direct-communication communication reconnaissance technology...
Aiming at the problem that the fault tolerant performance of existing blind recognition methods of RS (Reed-Solomon) code based on matrix transformation is not ideal enough, a new approach is proposed in this paper to simplify the procedure of obtaining primitive polynomial and improve the performance. Moreover, the method of probability statistic is exploited to increase the recognition probability...
For asynchronous transmission, the scheme with fountain codes is more attractive. In multi-relay system, each relay encodes with fountain codes and transmits encoded packets independently. A practical family of Raptor codes is proposed, which combines flexible pre-code with short-length LT codes. Simulation results show that the transmission scheme with our proposed fountain codes can achieve better...
Cooperative transmission is an efficient way to combat fading for wireless communication. In this paper, a bandwidth-efficient multi-user cooperation scheme is proposed, that is based on TPC(Turbo Product Codes)-BICM(Bit-Interleaved Coded Modulation). In the multi-user cooperation, we use distributed transmission to achieve diversity gain. The bit error rate(BER) performance is discussed and BER upper...
Recently, the universality of a well-designed LDPC code ensemble has been recognized. Take the DVB standards for example. The structured LDPC codes originally developed for satellite communications have been reused in terrestrial and cable channels. To this end, a bit interleaver can be employed to adapt the profile of the given code to the variation of channel conditions. In this paper, we focus...
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