A new reduced-complexity algorithm for multiple-symbol differential detection of m-ary DDPSK

@inproceedings{Nie2012ANR,
  title={A new reduced-complexity algorithm for multiple-symbol differential detection of m-ary DDPSK},
  author={Yong Nie and Yue-hong Shen and Mingxi Guo},
  year={2012}
}
Although multiple-symbol differential detection (MSDD) of double differential phase-shift keying (DDPSK) provides much better error performance than conventional double differential detection, its complexity is much higher. In this paper, a fast algorithm for MSDD is presented, which reduces the number of trellis paths searched by using a subset search concept. It is proved that its performance is identical to that of the original receiver, while its complexity is only proportional to the (N-1… 

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A new reduced-complexity algorithm for multiple-symbol differential detection

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    IEEE Communications Letters
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This work proposes a reduced-complexity algorithm for MSDD, which shows that the performance of the reduced complexity receiver is nearly identical to that of the original receiver, but with typical parameters, the number of phase sequences searched can be reduced by a factor of sixteen for QPSK to over four thousand for 16-PSK thereby leading to significant receiver complexity reduction.

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The paper gives a fast (optimum) algorithm to implement MSDD, which uses maximum likelihood sequence detection of N symbols to achieve a performance gain over conventional 2 symbol differential detection.

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