Daniel C. Cunha

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Keywords: Channel capacity Cooperative communications Flat fading channels Non-binary LDPC codes Outage probability Power optimization a b s t r a c t This work analyzes the optimal power allocation in coded cooperative communication systems with a single relay and using the amplify-and-forward protocol. Non-binary low-density parity-check (LDPC) codes are(More)
Unequal error protection (UEP) codes provide a selective level of protection for different blocks of the information message. The effectiveness of two sub-optimum soft-decision decoding algorithms, namely generalized Chase-2 and weighted erasure decoding, is evaluated in this study for each protection class of UEP block codes. The performances of both(More)
— Capacity of M-ary Amplitude and Phase-Shift Keying (M-APSK) over an Additive White Gaussian Noise (AWGN) channel that also introduces an unknown carrier phase rotation is considered. The phase remains constant over a block of L symbols and it is independent from block to block. Aiming to design codes with equally probable symbols, uniformly distributed(More)
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