Title :
Interference Analysis in Downlink OFDM Considering Imperfect Intercell Synchronization
Author :
Hamdi, Khairi Ashour ; Shobowale, Yemisi M.
Author_Institution :
Sch. of Electr. & Electron. Eng., Univ. of Manchester, Manchester, UK
Abstract :
This paper presents a theoretical performance analysis of downlink orthogonal frequency-division multiplexing (OFDM) cellular radio communication systems. An accurate interference model that takes into account the cochannel and interchannel interference caused by both frequency and timing synchronization errors in adjacent and cochannel cells is developed. The effect of frequency-selective fading on the interfering signals has also accurately been taken into consideration. Based on this model, accurate expressions are given for average bit error rates (BERs) of OFDM-based M-ary quadrature amplitude modulation (QAM). These are extended to include multichannel reception with maximal ratio combining diversity.
Keywords :
OFDM modulation; adjacent channel interference; cellular radio; cochannel interference; diversity reception; error statistics; quadrature amplitude modulation; radio links; synchronisation; bit error rate; cellular radio communication system; cochannel interference; downlink OFDM; downlink orthogonal frequency-division multiplexing; frequency synchronization error; frequency-selective fading; imperfect intercell synchronization; interchannel interference; interference analysis; interference model; interfering signal; maximal ratio combining diversity; multichannel reception; quadrature amplitude modulation; timing synchronization error; Cochannel interference; frequency-division multiplexing; interchannel interference; land mobile radio cellular systems; multipath channels; wireless local area network (LAN);
Journal_Title :
Vehicular Technology, IEEE Transactions on
DOI :
10.1109/TVT.2009.2013959
