Authors:
Carlos Ribeiro
1
and
Atílio Gameiro
2
Affiliations:
1
Instituto Politécnico de Leiria, Portugal
;
2
Instituto de Telecomunicações, Universidade de Aveiro, Portugal
Keyword(s):
OFDM, MIMO, pilot-aided channel estimation, pilot sequence design, time-domain processing.
Related
Ontology
Subjects/Areas/Topics:
MIMO Systems and Techniques
;
Multi-Carrier and CDMA, OFDM, Spread-Spectrum and UWB
;
Telecommunications
;
Wireless and Mobile Technologies
;
Wireless Information Networks and Systems
Abstract:
A pilot sequence design for MIMO-OFDM systems is investigated where all transmit antennas share the same
sub-carriers to convey pilot symbols. The pilot sequences are endowed with phase-shifting properties, granting the receiver the possibility of extracting the impulse responses for all channels directly from the antennas’ time-domain received signals, without co-channel interference. A linear processing of the time-domain samples is all that is needed to get the channel impulse responses, resulting in an algorithm with very low computational load. The feasibility of the investigated method is substantiated by system simulation using indoor and outdoor broadband wireless channel models.