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The capacity of differential pulse-position modulation (DPPM) is considered in this paper. Since the formula of Shannon Capacity is effective only in the AWGN channel with continuous-valued inputs and outputs, while the channel employing M-ary DPPM modulation has discrete-valued inputs and continuous-valued outputs, we derive the modified formula which applies to calculate the capacity of a UWB system...
A selective approach is proposed to improve the performance of Time-Hopping (TH) PPM UWB image transmission system over indoor fading channels. We divided the image information into key information and secondary information. In the proposed approach, key information is transmitted with good channel condition, secondary information otherwise. The threshold of channel condition can be derived from the...
In this paper, we determine the channel capacity of 60 GHz wireless communications over additive white Gaussian noise channels. The channel capacity with phase shift keying (PSK) is investigated under FCC power constraints for the unlicensed 59- 64 GHz radio spectrum. It is shown that the capacity of 60 GHz wireless communications is a function of distance and signal to noise (SNR) ratio, which demonstrates...
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