This paper is concerned with the problem of carrier-phase recovey in narrow-band Wary phase shift keying. A number of methods proposed in the literature are analysed and their relative merits are pointed out. The effect of trellis coding on channel symbols is also discussed. The various methods are contrasted using the phase errcr variance of the recovered carrier as performance measure. The effect of timing errors is also shown for ciock-aided schemes.

This paper deals with the power allocation problem for coded multicarrier transmission. Specifically, we focus on a bit interleaved coded modulation (BICM) packet transmission implemented with Orthogonal Frequency Division Multiplexing (OFDM) and in the presence of automatic repeat request (ARQ) protocol. Capitalizing on the binary-input output-symmetric (BIOS) nature of the BICM channel it is provided a simple upper-bound of the rate of information bits received without any error, the so called goodput. Based on this theoretical characterization, we develop a power allocation strategy among the different subcarriers so that the system goodput performance metric is maximized. The effectiveness of the proposed method is numerically testified for BICM-OFDM transmission in the context of the typical WLAN scenario. This full text paper was peer reviewed at the direction of IEEE Communications Society subject matter experts for publication in the ICC 2008 proceedings.

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