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The bit error probability (BEP) of DQPSK with Gray coding over an AWGN channel can be computed simply, although it is hard to integrate and derive the average BEP for fading channels. Presented are novel approximations of the average BEP of DQPSK with Gray coding over fading channels. Numerical results show that the novel formulations are quite accurate.
Today, in OFDM systems, zero-IF receivers are very appealing, because they avoid costly IF filters. However, this very popular architecture implies IQ demodulation at RF and thus introduces new drawbacks and large performance degradations. It's therefore very important to study the impact of RF front-end non- idealities on performances of OFDM receiver. Especially, it's necessary to investigate the...
This paper presents an analysis of the pair-wise error rates and average bit-error rates (BER) of orthogonal dirty-paper codes. The error rate expressions are derived and also verified by simulations. It is also found that, when applied in watermarking systems, the optimum code length of such orthogonal dirty-paper codes is a function of the data hiding rate and the document-to-watermark ratio
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