Abstract
A high peak-to-average-power ratio (PAPR) is a primary draw-back of orthogonal frequency-division multiplexing (OFDM). Many methods have been proposed to reduce the OFDM PAPR for single-antenna and for MIMO systems. Some systems, however, use multiple antennas for frequency-selective transmit beamforming either to a single or multiple simultaneous receivers. This paper presents a new method for PAPR reduction that minimizes the peak power across all antennas while preserving the maximal ratio transmission (MRT) gain and zero-crosstalk criteria at the receivers. Because the gain and zero crosstalk is preserved at the receivers, no performance loss is seen by the receivers when using the PAPR-reduced transmit vector. With eight transmit antennas, the algorithm demonstrates an average of 5.5 dB PAPR reduction for single-user beamforming and about 4.5 dB PAPR reduction for four-user transmit spatial division multiple access (Tx-SDMA).
| Original language | English (US) |
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| Title of host publication | 2006 IEEE International Conference on Acoustics, Speech, and Signal Processing - Proceedings |
| Volume | 4 |
| State | Published - 2006 |
| Event | 2006 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2006 - Toulouse, France Duration: May 14 2006 → May 19 2006 |
Other
| Other | 2006 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2006 |
|---|---|
| Country/Territory | France |
| City | Toulouse |
| Period | 5/14/06 → 5/19/06 |
ASJC Scopus subject areas
- Software
- Signal Processing
- Electrical and Electronic Engineering