An iterative multi-user decoder with soft-interference cancellation

Kerr, R.; Guinand, Paul; Moher, M.

doi:10.1109/icc.1999.767881

Cited by 7 publications

(6 citation statements)

References 4 publications

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“…For the synchronous system, we consider a synchronous CDMA channel with equal cross-correlation R h,k between users. This is equivalent to the K-symmetric channel that was discussed in [19] and used in [11,20,21]. The Ksymmetric channel model permits the comparison of performance of receivers with changes in cross-correlation values.…”

Section: Simulation Results In K-symmetric Awgn Channelmentioning

confidence: 99%

“…By the conventional iterative receiver system we mean the approach in which the estimated interference is subtracted from the received signal prior to channel decoding. This type of receiver is discussed in [9,11]. In [9], hard tentative decision is made on the output of the turbo decoder of all other users on the channel in order to estimate the MAI.…”

Section: Performance Discussionmentioning

confidence: 99%

“…In [9], hard tentative decision is made on the output of the turbo decoder of all other users on the channel in order to estimate the MAI. In [11], the soft output of the turbo decoder of all other users on the channel is used in estimating the MAI. Performance of the developed system in the presence of the near-far phenomenon, with variable coding rate and in the asynchronous CDMA system, is here investigated through simulations.…”

Section: Performance Discussionmentioning

confidence: 99%

“…This scheme integrates the subtraction of the estimated multiple-access interference and channel decoding. The iterative interference canceller was also studied in [10,11]. The iterative receiver of [11] tries to improve on the ones proposed in [9,10] the received signal.…”

Section: Introductionmentioning

confidence: 99%

“…The iterative interference canceller was also studied in [10,11]. The iterative receiver of [11] tries to improve on the ones proposed in [9,10] the received signal. The partial interference canceller of [12] was combined with turbo decoding in [13].…”

Section: Introductionmentioning

confidence: 99%

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An Iterative Multiuser Detector for Turbo-Coded DS-CDMA Systems

Bejide

Takawira

2005

EURASIP J. Adv. Signal Process.

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We propose an iterative multiuser detector for turbo-coded synchronous and asynchronous direct-sequence CDMA (DS-CDMA) systems. The receiver is derived from the maximum a posteriori (MAP) estimation of the single user's transmitted data, conditioned on information about the estimate of the multiple-access interference (MAI) and the received signal from the channel. This multiple-access interference is reconstructed by making hard decisions on the users' detected bits at the preceding iteration. The complexity of the proposed receiver increases linearly with the number of users. The proposed detection scheme is compared with a previously developed one. The multiuser detector proposed in this paper has a better performance when the transmitted powers of all active users are equal in the additive white Gaussian noise (AWGN) channel. Also, the detector is found to be resilient against the near-far effect

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Section: Simulation Results In K-symmetric Awgn Channelmentioning

confidence: 99%