Title :
Frequency domain equalizer for multirate UMTS-TDD systems
Author :
Gonçalves, Luis ; Gameiro, Atilio
Author_Institution :
Instituto de Telecommunicacoes, Campus Univ. de Santiago, Aveiro, Portugal
Abstract :
Direct-sequence spread spectrum (DS-SS) signals exhibit cyclostationary properties which imply a redundancy between frequency components separated by multiples of the symbol rate. In this paper we present a multiple access interference canceller that explores this property and applies to UMTS-TDD. This linear frequency domain canceller operates in the spreaded signal in such a way that the interference and noise at its output is minimized (minimum mean squared error criterium). The performance is evaluated in two configurations: one including the frequency shift canceller (FSC) and the other concatenated with parallel interference canceller (PIC). The results are benchmarked against the performance of the conventional RAKE detector and the conventional PIC detector.
Keywords :
3G mobile communication; code division multiple access; equalisers; frequency-domain analysis; interference suppression; least mean squares methods; radiofrequency interference; redundancy; spread spectrum communication; time division multiplexing; Universal Mobile Telecommunication System; cyclostationary properties; direct-sequence spread spectrum signals; frequency domain equalizer; frequency shift canceller; linear frequency domain canceller; minimum mean squared error criterium; multiple access interference canceller; multirate UMTS-TDD systems; noise; parallel interference canceller; redundancy; Concatenated codes; Detectors; Equalizers; Frequency domain analysis; Interference cancellation; Multiple access interference; Noise cancellation; Power capacitors; Redundancy; Spread spectrum communication;
Conference_Titel :
Communications, 2003. ICC '03. IEEE International Conference on
Print_ISBN :
0-7803-7802-4
DOI :
10.1109/ICC.2003.1204036
