Abstract
In this work, we have analysed the performance of a low density parity check (LDPC) coded Amplify and forward (AF) based asynchronous distributed space time block coded (ADSTBC) cooperative system. The proposed concatenated LDPC-ADSTBC is delay tolerant, where LDPC codes provide coding gain to the system and ADSTBC provides diversity gain for arbitrary number of relays, number of symbols transmitted and number of receive antennas. For the multi-relay scenario, we have derived closed form expression for the pair-wise error probability (PEP) of the system. The derived analytical results of the performance of the proposed delay tolerant multiple relay asynchronous cooperative communication are validated by simulation results.DOI: http://dx.doi.org/10.5755/j01.eie.24.6.22296
Highlights
Future wireless networks rely heavily on multiple input multiple output (MIMO) as one of its strongest potential candidate [1]
The closed form expression for the pair wise error probability (PEP) of delay tolerant asynchronous distributed space time block coded (ADSTBC) system concatenated with an irregular low density parity check (LDPC) codes has been derived
We observe an improvement of 1.5 dB in SNR for PEP of 10-3 for the case of LDPC coded asynchronous Distributed space Time Block codes (DSTBC) system (LDPC-ADSTBC) over asynchronous DSTBC system and 4.5 dB over synchronous DSTBC
Summary
Future wireless networks rely heavily on multiple input multiple output (MIMO) as one of its strongest potential candidate [1]. Linear dispersion (LD) codes [6] act as an umbrella codes yielding both diversity and capacity gains for synchronous as well as the asynchronous environments These were later extended to the cooperative communications as Distributed space Time Block codes (DSTBC) [7]. Existing literature consists of several techniques in cooperative communication concatenated with LDPC codes thereby yielding enhanced performance of the system in the synchronous environment [13]–[16]. We have derived the closed form expression for the pair wise error probability (PEP) of asynchronous DSTBC (ADSTBC) system concatenated with an irregular LDPC codes. The closed form expression for the pair wise error probability (PEP) of delay tolerant ADSTBC system concatenated with an irregular LDPC codes has been derived.
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