A simple approach to near-optimal multiuser detection: interleave-division multiple-access

Li, Ping; Liu, Lihai; Leung, W.K.

doi:10.1109/wcnc.2003.1200381

Cited by 118 publications

(86 citation statements)

References 13 publications

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“…After the interleaving process in the transmitter, x k is transmitted over multiple access channels [3,4,6]. The MUD receiver includes an ESE and a bank of K single-user a posteriori probability (APP) decoders (DECs) [3,4].…”

Section: Transmitter and Receiver Structures Of Idma Systemmentioning

confidence: 99%

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Effect of repetition coding on the BER performance of interleave-division multiple access systems

Bilim

Kapucu²,

Develı³

2016

Turk J Elec Eng & Comp Sci

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This paper investigates the bit error rate (BER) performance of interleave-division multiple access (IDMA) schemes to show the effect of repetition coding on the system performance. The considered system is tested in the presence of repetition coding by varying system parameters such as number of simultaneous users, data length, spread length, iteration number, and code rate over additive white Gaussian noise channels. In addition, the performance of the considered system is also illustrated in Rayleigh flat fading channels for a more realistic scenario. Our simulation resultsshow that the BER performance of IDMA systems with repetition coding can achieve significant performance gains over existing uncoded IDMA schemes.

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Section: Transmitter and Receiver Structures Of Idma Systemmentioning

confidence: 99%

“…The IDMA system differs from the CDMA system in the sense that the chip-interleaving process is used for user separation. In the context of IDMA systems, it is assumed that this interleaving process is employed randomly and independently [4,6]. The authors in [7] also presented chip-interleaved CDMA to combat ISI and MAI.…”

Section: Introductionmentioning

confidence: 99%

Effect of repetition coding on the BER performance of interleave-division multiple access systems

Bilim

Kapucu²,

Develı³

2016

Turk J Elec Eng & Comp Sci

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“…One successful approach for uncoordinated multiple-access is Interleaver-Division Multiple-Access (IDMA) [2] [3]. With IDMA, every user has the same channel code, but each user's code bits are permuted using a randomly drawn interleaver, unique with extremely high probability.…”

Section: Uncoordinated Multiple Access In the Or Channelmentioning

confidence: 99%

“…However, completely uncoordinated transmissions using interleaver-division multiple access (IDMA) [2] [3] and simple decoding that treats other users as noise is an attractive alternative. Surprisingly, in the multiple-user OR channel, this relatively low-complexity approach can theoretically achieve about 70% of full efficiency.…”

Section: Introductionmentioning

confidence: 99%

Trellis Codes with Low Ones Density for the OR Multiple Access Channel

Griot

Casado

Weng

et al. 2006

2006 IEEE International Symposium on Information Theory

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Abstract-This paper presents trellis codes for the Z channel designed to maintain a relatively low ones density. These codes have applications in pulse-position modulation systems and as a solution for uncoordinated communication on the binary OR multiple-access channel (MAC). In this paper we consider the latter application to demonstrate the performance of the codes.The OR channel provides an unusual opportunity where single-user decoding permits operation at about 70% of the full multiple-access channel sum capacity. The interleaver-division multiple access technique applied in this paper should approach that performance with turbo solutions. However, the current paper focuses on very low latency codes with simple decoding, intended for very high speed (gigabits per second) applications. Namely, it focuses on nonlinear trellis codes that provide about 30% of the full multiple-access sum capacity at high speeds and with very low latency. These trellis codes are designed specifically for the Z-Channel that arises in a multiple-user OR channel, when the other users are treated as noise. In order to optimize the sum-capacity of the OR-MAC, the trellis code transmits codewords with a ones density much less than 50%. Also, a union bound technique that predicts the performance of these codes is presented. Results from simulations and a working FPGA implementation are shown.

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“…In [1], an IDMA system that uses randomly and independently generated interleavers is presented. With these interleavers, the IDMA system in [1] performs similarly and even better than a comparable CDMA system.…”

Section: Introductionmentioning

confidence: 99%

Efficient Generation of Interleavers for IDMA

Pupeza

Kavcic

Ping

2006

2006 IEEE International Conference on Communications

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Abstract-We consider the design of practical interleavers for interleaver division multiple access (IDMA) systems. A set of interleavers is considered to be practical if it satisfies two criteria: 1) It is easy to generate (i.e., the transmitter and receiver need not store or communicate many bits in order to agree upon an interleaver), and 2) no two interleavers in the set "collide". We show that a properly defined correlation between interleavers can be used to formulate a collision criterion, where zero-correlation (i.e., orthogonality) implies no collision. Computing the correlation among non-orthogonal interleavers is generally computationally very expensive, so we also design an upper-bounding technique to efficiently check whether two interleavers have low correlation. We then go on to propose several methods to design practical interleavers for IDMA: one method to design orthogonal interleavers, and two methods to design non-orthogonal interleavers (where the upper-bounding technique is used to verify their cross-correlation is low). Simulation results are presented to show that the designed practical interleavers perform as well as random interleavers in an IDMA system.

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A simple approach to near-optimal multiuser detection: interleave-division multiple-access

Cited by 118 publications

References 13 publications

Effect of repetition coding on the BER performance of interleave-division multiple access systems

Effect of repetition coding on the BER performance of interleave-division multiple access systems

Trellis Codes with Low Ones Density for the OR Multiple Access Channel

Efficient Generation of Interleavers for IDMA

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