Abstract
Differential encoding is known to simplify receiver complexity because it by-passes channel estimation. However, over rapidly fading wireless channels, extra transceiver modules are necessary to enable differential transmission. Relying on a basis expansion model for time and frequency selective (doubly-selective) channels, we derive such a generalized block differential (BD) codec that achieves the maximum Doppler and multi-path diversity gains, while affording low-complexity maximum likelihood (ML) decoding. We further show that existing BD systems over frequency-selective or time-selective channels follow as special cases of our novel system. Simulations corroborate our theoretical analysis.
Original language | English (US) |
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Article number | SP02-3 |
Pages (from-to) | 1922-1926 |
Number of pages | 5 |
Journal | IEEE International Conference on Communications |
Volume | 3 |
State | Published - Sep 12 2005 |
Event | 2005 IEEE International Conference on Communications, ICC 2005 - Seoul, Korea, Republic of Duration: May 16 2005 → May 20 2005 |