High-throughput, high-performance OFDM via pseudo-orthogonal carrier interferometry coding

Wiegandt, D.A.; Nassar, C.R.

doi:10.1109/pimrc.2001.965328

Cited by 19 publications

(7 citation statements)

References 6 publications

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“…Specifically, after serial-to-parallel conversion, a spreading sequence is applied to each OFDM symbol, (1) ensuring each symbol is transmitted over all carriers, and (2) creating orthogonality among the N symbols co-located on identical carriers. This allows the receiver to exploit large frequency diversity gains available over the channel [3][4]. This CI/OFDM transmitter is illustrated in Fig.2 The transmitted signal for the th k symbol in a CI/OFDM system is thus:…”

Section: Ofdm and Ci/ofdmmentioning

confidence: 99%

“…In the earlier work of [3][4], a novel OFDM architecture is proposed which is capable of exploiting frequency diversity without any throughput loss and with a very low increase in complexity. Furthermore, the novel system, referred to as CI/OFDM (Carrier Interferometry OFDM), eliminates the large power peaks and, hence, most PAPR issues, without significant rise in system complexity.…”

Section: Introductionmentioning

confidence: 99%

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High-Throughput High-Performance VLST-CI/OFDM with Low PAPR

Peng

2006

2006 International Conference on Wireless Communications, Networking and Mobile Computing

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In this paper, OFDM (uncoded and coded) systems are combined with both Vertical layered Space-Time (VLST) architecture and Carrier Interferometry (CI) spreading codes, resulting in the so called VLST-CI/OFDM system and VLST-CI/COFDM system. It is shown that the novel systems offer considerable high throughput provided by VLST architecture and simultaneously achieve dramatic performance gains by taking advantage of large frequency diversity inherent in the CI/OFDM technique. In this paper, we show that the proposed VLST-CI/OFDM (or VLST-CI/COFDM) system has a more stable envelope and, ultimately, an average PAPR far smaller than that of VLST-OFDM (or VLST-COFDM).

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Section: Ofdm and Ci/ofdmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High-Throughput High-Performance VLST-CI/OFDM with Low PAPR

Peng

2006

2006 International Conference on Wireless Communications, Networking and Mobile Computing

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“…Most of these involve some form of cooperative scheduling [1,2]. Some work has been done to show that time domain signal processing can be used to mitigate the effects of narrowband interference [3][4][5][6][7][8]. They have shown in simulation how their techniques can suppress interference on the data payload, but have not taken into account how interference affects other parts of the receiver.…”

Section: Introductionmentioning

confidence: 99%

A practical two-stage MMSE based MIMO detector for interference mitigation with non-cooperative interferers

Shah

Daneshrad

2011

J Wireless Com Network

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Wireless Multiple Input Multiple Output systems provide system designers with additional degrees of freedom. These can be used to increase throughput, reliability, or even combat spatial interference. The classical Minimum Mean Squared Error (MMSE) solution is the optimal linear estimator for these systems. Its primary drawback is that it requires an estimate of the channel response. This is generally not an issue when interference is absent. However, in environments where interference power is stronger than the desired signal power, this can become difficult to estimate. The problem is even worse in packet-based systems, which rely on training data to estimate the channel before estimating the signal. A strong interference will hinder the receiver's ability to detect the presence of the packet. This makes it impossible to estimate the channel, a critical component for the classical MMSE estimator. For this reason, the classical solution is infeasible in real environments with stronger interferences. We propose a two-stage system that uses practically obtainable channel state information. We will show how this approach significantly improves packet detection, and how the overall solution approaches the performance of the classical MMSE estimator.

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“…Since PO-CI/MC-CDMA systems own the novel characteristics above, a lot of communication methods have been researched and proposed based on PO-CI sequences, which have been analyzed in Refs. [5][6][7][8][9] in an OFDM system. In Ref.…”

Section: Introductionmentioning

confidence: 99%

A PO-CI/MC-CDMA scheme for high modulation styles

Zhang

Tang

Tao

et al. 2008

Front. Electr. Electron. Eng. Ch

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Through analyzing the theoretical spreading principle, it has been proved in this paper that the benefit of pseudo-orthogonal carrier interferometry (PO-CI) spreading code is not supported when complex signal modulation (e.g., quadrature phase-shift keying (QPSK) and quadrature amplitude modulation (QAM)) types are employed. On this basis, a novel and feasible structure for this problem is brought forward. Within the structure mentioned, instead of complex modulation patterns, pulse amplitude modulation (PAM) combined with PO-CI spreading code is utilized. This allows us to maintain the throughput increase of a multi-carrier code division multiple access (MC-CDMA) system with minimal loss in performance and no bandwidth expansion.

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High-throughput, high-performance OFDM via pseudo-orthogonal carrier interferometry coding

Cited by 19 publications

References 6 publications

High-Throughput High-Performance VLST-CI/OFDM with Low PAPR

High-Throughput High-Performance VLST-CI/OFDM with Low PAPR

A practical two-stage MMSE based MIMO detector for interference mitigation with non-cooperative interferers

A PO-CI/MC-CDMA scheme for high modulation styles

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