Title :
Block double differential design for OFDM with carrier frequency offset
Author_Institution :
Dept. of Electr. & Comput. Eng., Auburn Univ., AL, USA
Abstract :
Carrier frequency offset (CFO) estimation for orthogonal frequency division multiplexing (OFDM) has caught attention as OFDM systems have become widely adopted in recent years. In this paper, we design a novel double differential codec with low computational complexity. Our design bypasses CFO and channel estimation and is easy to be implemented at both transmitter and receiver. It also guarantees full multipath diversity, and reduces the peak-to-average power ratio from the number of subcarriers to the channel order. In addition, it is robust to CFO drifting. The closed form of the performance for our design is derived for OFDM transmissions over frequency-selective channels with CFO. Thorough simulation results corroborate our claims.
Keywords :
OFDM modulation; codecs; differential detection; diversity reception; frequency estimation; radio receivers; radio transmitters; CFO drifting; CFO estimation; OFDM; block double differential design; carrier frequency offset; double differential codec; frequency-selective channels; full multipath diversity; orthogonal frequency division multiplexing; performance; receiver; reduced peak-to-average power ratio; transmitter; Bit error rate; Channel estimation; Codecs; Computational complexity; Decoding; Frequency estimation; OFDM; Peak to average power ratio; Robustness; Transmitters;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2005. Proceedings. (ICASSP '05). IEEE International Conference on
Print_ISBN :
0-7803-8874-7
DOI :
10.1109/ICASSP.2005.1415834
