Abstract
Orthogonal frequency division multiplexing (OFDM) converts a dispersive channel into parallel subchannels and thus facilitates equalization. But when the channel has nulls close to or on the FFT grid, OFDM faces serious symbol recovery problems. As an alternative to various error-control coding techniques that have been proposed to ameliorate the problem, we linearly precode (LP) symbols before they are multiplexed. We identify the maximum achievable diversity order for iid or correlated Rayleigh fading channels and also provide design rules for achieving maximum diversity gains with LP-OFDM. Simulated performance comparisons of LP-OFDM with existing block and convolutionally coded OFDM alternatives favor LP-OFDM in a HiperLan2 experiment.
| Original language | English (US) |
|---|---|
| Title of host publication | 2001 IEEE 3rd Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2001 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 267-270 |
| Number of pages | 4 |
| ISBN (Electronic) | 0780367200 |
| DOIs | |
| State | Published - 2001 |
| Event | 3rd IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2001 - Taoyuan, Taiwan, Province of China Duration: Mar 20 2001 → Mar 23 2001 |
Publication series
| Name | IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC |
|---|---|
| Volume | 2001-January |
Other
| Other | 3rd IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2001 |
|---|---|
| Country/Territory | Taiwan, Province of China |
| City | Taoyuan |
| Period | 3/20/01 → 3/23/01 |
Bibliographical note
Publisher Copyright:© 2001 IEEE.
Keywords
- AWGN
- Convolution
- Convolutional codes
- DSL
- Digital video broadcasting
- Dispersion
- Diversity methods
- Fading
- OFDM
- Transmitters