Title :
Signal design and spectral efficiency in multi-carrier multiple access systems with PAPR as a parameter
Author :
Ginige, Thilak ; Rajatheva, Nandana ; Ahmed, K.M.
Author_Institution :
Telecommun. Program/SAT, Asian Inst. of Technol., Bangkok, Thailand
Abstract :
In this paper we investigate a signal design method to increase spectral efficiency and to limit high peak to average power ratio (PAPR) input signal combinations to OFDM sub-carriers. It reduces PAPR level of an OFDM system without decreasing bandwidth utilization. The system design also shows how a set of concatenated Walsh Hadamard (WH) codes can be used to spread a block of information bits to increase number of orthogonal spreading codes while keeping the spreading factor at a low level
Keywords :
Hadamard codes; OFDM modulation; code division multiple access; concatenated codes; modulation coding; spread spectrum communication; OFDM sub-carriers; PAPR; WH codes; bandwidth utilization; concatenated Walsh Hadamard codes; multi-carrier multiple access systems; orthogonal spreading codes; peak to average power ratio; signal design; spectral efficiency; spreading factor; Bandwidth; Concatenated codes; Data communication; Error correction; Error correction codes; Fading; OFDM modulation; Peak to average power ratio; Power distribution; Signal design;
Conference_Titel :
Vehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 IEEE 51st
Conference_Location :
Tokyo
Print_ISBN :
0-7803-5718-3
DOI :
10.1109/VETECS.2000.851607
