Estimation Method for Extraction and Reinjection-Type Interference Canceller


IEICE TRANSACTIONS on Communications   Vol.E79-B    No.3    pp.373-377
Publication Date: 1996/03/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section LETTER (Special Issue on Advanced Adaptive Radio Communication Technologies)

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As the most applicable interference canceller, an Extraction and Reinjection-type Interference Canceller (ERIC) has been proposed, which extracts interference signals from received signals and cancels interference using these extracted signals. However, it is not yet clarified as to how this canceller's performance level for interference cancellation can be obtained when fading occurs. In this letter, a theoretical evaluation is performed using an ERIC by dividing it into an interference extraction part and an interference cancellation part. The performance of the interference extraction for transmission is estimated, and that of the improvement factor is derived. It is confirmed that theoretical estimations agree closely with experimental results. In addition, through simulations, we estimate the degree of improvement in the interference cancellation using this canceller in a fading environment. The results clarify that this canceller is the most valid when the average received-signal power rate, D/U, is 20 dB, and the maximum improvement using this canceller is 7.5 times better than without using the canceller.