AMOUR - generalized multicarrier transceivers for blind CDMA regardless of multipath

Georgios B. Giannakis, Zhengdao Wang, Anna Scaglione, Sergio Barbarossa

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

Abstract

Suppression of multiuser interference (MUI) and mitigation of multipath effects constitute major challenges in the design of third-generation wireless mobile systems. Most wide-band and multicarrier uplink code-division multiple-access (CDMA) schemes suppress MUI statistically in the presence of unknown multipath. For fading resistance, they all rely on transmit- or receive-diversity and multichannel equalization based on bandwidth-consuming training sequences or self-recovering techniques at the receiver end. Either way, they impose restrictive and difficult to check conditions on the finite-impulse response channel nulls. Relying on block-symbol spreading, we design a mutually-orthogonal usercode-receiver (AMOUR) system for quasi-synchronous blind CDMA that eliminates MUI deterministically and mitigates fading regardless of the unknown multipath and the adopted signal constellation. AMOUR converts a multiuser CDMA system into parallel single-user systems regardless of multipath and guarantees identifiability of users' symbols without restrictive conditions on channel nulls in both blind and nonblind setups. An alternative AMOUR design called Vandermonde-Lagrange AMOUR is derived to add flexibility in the code assignment procedure. Analytic evaluation and preliminary simulations reveal the generality, flexibility, and superior performance of AMOUR over competing alternatives.

Original languageEnglish (US)
Pages (from-to)2064-2076
Number of pages13
JournalIEEE Transactions on Communications
Volume48
Issue number12
DOIs
StatePublished - Dec 2000

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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