Abstract
Impulse radio (IR) ultrawide band systems have well documented advantages for low-power peer-to-peer and multiple access communications. Space-time (ST) coding on the other hand, has gained popularity as an effective means of boosting rates and performance. Existing IR transmitters rely on a single antenna, while ST coders have so far focused on digital linearly modulated transmissions. In this paper, we develop an orthogonal ST coding scheme for the analog nonlinearly (pulse-position) modulated multi-antenna IR system. We show that the resulting analog noncoherent detector is equivalent to an existing digital ST decoder possessing maximum likelihood optimality. Simulations testing peer-to-peer and multi-access IR scenarios confirm considerable increase in both bit-error-rate performance and number of users that can be accommodated, when wedding ST coding with IR.
Original language | English (US) |
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Pages | 235-240 |
Number of pages | 6 |
DOIs | |
State | Published - 2002 |
Event | 2002 IEEE Conference on Ultra Wideband Systems and Technologies, UWBST 2002 - Baltimore, MD, United States Duration: May 21 2002 → May 23 2002 |
Other
Other | 2002 IEEE Conference on Ultra Wideband Systems and Technologies, UWBST 2002 |
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Country/Territory | United States |
City | Baltimore, MD |
Period | 5/21/02 → 5/23/02 |