On the Performance of Partitioned-Spreading CDMA with Multistage Demodulation

Shi, Zhenning; Schlegel, Christian; Kempter, R.; Reed, Mark C.

doi:10.1109/ciss.2006.286381

Cited by 3 publications

(3 citation statements)

References 14 publications

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“…This is easily exceeded with the MMSE, where the supportable number of transmissions equals G = 27 packets. Even higher performance can be achieved with partitioned spreading demodulation, where the maximum load approaches G = 34, in unison with [38,39,48]. For all the receivers, the throughput curves break down rapidly, indicating that after a certain load, the effective SINR after the detector was not sufficient for detection.…”

Section: Network Simulationsmentioning

confidence: 99%

“…Nevertheless, although it seems that there may be limited benefit in upgrading to partitioned spreading demodulation in certain cases, this may only be a part of the picture. It was shown in [38,39,48] that in contrast to other receiver methodologies, partitioned spreading allows to resolve virtually all multiuser interference. In our model, the rate regions for the various demodulators are formed by the packets whose SINR after the demodulator satisfy Γ i > γ; this means that we do not capture the degree to which the SINRs exceed the detection threshold.…”

Section: Effect Of the Header Frame On The Stability Region Of Rp-cdmamentioning

confidence: 99%

“…As the effect of the header diminishes, the performance of RP-CDMA is directly and only determined by the datadetection scheme. We want to refer the curious reader to [48] for a discussion on the achievable spectral efficiency of partitioned spreading.…”

Section: A Note On the Achievable Spectral Efficiency Of Rp-cdmamentioning

confidence: 99%

See 2 more Smart Citations

Enhancing the Performance of Random Access Networks with Random Packet CDMA and Joint Detection

Kempter¹,

Amini

Farhang‐Boroujeny

2008

EURASIP J. Adv. Signal Process.

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Random packet CDMA (RP-CDMA) is a recently proposed random transmission scheme which has been designed from the beginning as a cross-layer method to overcome the restrictive nature of the Aloha protocol. Herein, we more precisely model its performance and investigate throughput and network stability. In contrast to previous works, we adopt the spread Aloha model for header transmission, and the performance of different joint detection methods for the payload data is investigated. Furthermore, we introduce performance measures for multiple access systems based on the diagonal elements of a modified multipacket reception matrix, and show that our measures describe the upper limit of the vector of stable arrival rates for a finite number of users. Finally, we simulate queue sizes and throughput characteristics of RP-CDMA with various receiver structures and compare them to spread Aloha.

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Section: Network Simulationsmentioning

confidence: 99%

Section: Effect Of the Header Frame On The Stability Region Of Rp-cdmamentioning

confidence: 99%

See 1 more Smart Citation

Enhancing the Performance of Random Access Networks with Random Packet CDMA and Joint Detection

Kempter¹,

Amini

Farhang‐Boroujeny

2008

EURASIP J. Adv. Signal Process.

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Multi‐layer interleave‐division multiple access: theory and practice

Hoeher

Schoeneich

Fricke

2008

Trans Emerging Tel Tech

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SUMMARYDirect-sequence code-division multiple access (DS-CDMA) is often put on the same level with CDMA, ignoring the fact that many different CDMA techniques exist. A special CDMA technique which has recently become popular is interleave-division multiple access (IDMA). In this semi-tutorial, focus is on a generalisation of IDMA referred to as interleave-division multiplexing (IDM)/IDMA or multi-layer IDMA for short. Multi-layer IDMA is a special form of superposition coding, and can be interpreted as a joint modulation, channel coding and multiple access scheme. Motivated by information theoretical arguments and practical functionalities, a wide range of subjects (such as capacity bounds, power allocation, receiver analysis, quality of service aspects, multi-layer ARQ and possible applications) are covered. This semi-tutorial consists of three parts: in the first part, an introduction to IDMA (Section 1) and multi-layer IDMA (Section 2) is given. In the second part, practical issues such as functionalities of multi-layer IDMA (Section 3) and multi-layer ARQ (Section 4) are studied. In the third part, information theoretical bounds in conjunction with power allocation (Section 5) and a receiver analysis (Section 6) are provided, before conclusions are drawn in Section 7.

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Multi-Layer Interleave-Division Multiple Access for 3GPP Long Term Evolution

Hoeher

Xu²

2007

2007 IEEE International Conference on Communications

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A multi-layer Interleave-Division Multiple Access (IDMA) based system proposal is presented in order to enhance the Universal Terrestrial Radio Access (UTRA) uplink. Compatibility and co-existence with the current UTRA FDD mode are of primary importance. Although focus is on UTRA long term evolution and related research activities initiated by the 3rd Generation Partnership Project (3GPP), multi-layer IDMA may be applied to enhance other Direct-Sequence CodeDivision Multiple Access (DS-CDMA) systems, or may serve as an innovative air interface for future systems. As a novel feature, non-uniform power allocation on chip level is introduced.

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On the Performance of Partitioned-Spreading CDMA with Multistage Demodulation

Cited by 3 publications

References 14 publications

Enhancing the Performance of Random Access Networks with Random Packet CDMA and Joint Detection

Enhancing the Performance of Random Access Networks with Random Packet CDMA and Joint Detection

Multi‐layer interleave‐division multiple access: theory and practice

Multi-Layer Interleave-Division Multiple Access for 3GPP Long Term Evolution

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