| Autor: |
Ahmed, Ahsen U., Thompson, Steve C., Chi, David W., Zeidler, James R. |
| Zdroj: |
MILCOM 2012 - 2012 IEEE Military Communications Conference; 1/ 1/2012, p1-6, 6p |
| Abstrakt: |
Constant Envelope OFDM (CE-OFDM) addresses the major issue of a high peak-to-average power ratio (PAPR) in OFDM. However, since CE-OFDM is based on angle modulation, it suffers from the well known threshold effect which results in a large performance degradation at low carrier-to-noise ratios (CNRs). In this paper, we study the impact of the threshold effect induced phase cycle slips on the underlying phase modulated OFDM subcarriers in CE-OFDM. We study both the signal-to-noise ratio (SNR) as well as the bit error rate (BER) performance on a subcarrier basis and show that the performance degradation due to the threshold effect is much more significant at lower frequency subcarriers. Finally we develop a low complexity subcarrier based technique to mitigate the effect of the phase cycle slips for significant performance improvement. [ABSTRACT FROM PUBLISHER] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
