Frequency - shift keying for Ultrawideband - How close to capacity can we get ?
نویسندگان
چکیده
In wideband systems that decorrelate in time and frequency, capacity can be reached in the limit of infinite bandwidth by using impulsive frequency-shift keying with vanishingly small duty cycle. The richness of the codewords is then created through the large bandwidth. We show that frequencyshift keying with small duty cycle, using traditional random coding arguments, can achieve rates close to capacity in ultrawideband systems with limits on bandwidth and peak power.
منابع مشابه
Frequency-shift keying for ultrawideband - achieving rates of the order of capacity
In wideband systems that decorrelate in time and frequency, capacity can be reached in the limit of infinite bandwidth by using impulsive frequency-shift keying (FSK) with vanishingly small duty cycle. The richness of the codebook is then created through the large bandwidth, thus requiring very large bandwidths in order to approach capacity. We show that FSK with small duty cycle can achieve ra...
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