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In this paper, we compute an achievable rate of a Gaussian Z-interference channel as shown in Fig. 1, when transmit node C has causal, imperfect cognitive knowledge of the signal sent by transmit node A. This achievable rate is derived using a two-phase transmission scheme in which node C uses a combination of a linear minimum mean square error (LMMSE) estimator and dirty paper code and node D employs...
In this paper, we compare the downlink transport spectral efficiency (TSE) of DS-CDMA using RAKE receiver, LMMSE receiver, the multiuser cyclic prefix OFDM and zero padding OFDM in wideband cellular systems. The TSE is defined as the distance weighted sum rate per unit bandwidth. It is derived in terms of the output signal to interference noise ratio as the sum of products of bits and the distances...
The bit error probability for BPSK modulation over correlated Rice fading channel is derived for minimum mean square error channel estimation using pilot symbol assisted modulation and diversity combining at the receiver. The optimal pilot-to-data power ratio is studied for different Rice K factors. The theoretical result is verified by Monte-Carlo simulation with space diversity fading model
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