Twisted Amplitude Phase Shift Keying
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چکیده
Several modulation techniques are defined in digital modulation, Here we are discussing about in four modulation techniques,8-PSK,8-TAPSK,16TAPSK and 16-QAM. In the paper we derive minimum non coherent distance(dnc)of block coded TAPSK and compare it with different modulation techniques, i.e. 8-PSK and 16-QAM using linear component codes. If the block length N is very small.NBC-16-TAPSK performs best among all non-coherent scheme and NBC-16QAM perform wrose due to its small minimum noncoherent distance. However, if the block length N is not short, NBC-16QAM has the best error performance because the code words with small non-coherent distances are rare. GENERAL TERMS-Non-coherent detection, block coded modulation(BCM), multilevel coding(MLC), bit error rate(BER), Signal to noise ratio(SNR). KEYWORDS-AWGN, Rayleigh, Flat fading channel
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