Two-dimensional (recursive) channel equalization for multicarrier systems with soft impulse shaping (MCSIS)

Matheus, Kirsten; Knoche, K.; Feuersänger, Martin; Kammeyer, Karl‐Dirk

doi:10.1109/glocom.1998.776871

Cited by 9 publications

(7 citation statements)

References 8 publications

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“…[8,91). Adding a CDMA component to the OFDM system is also a possibility to overcome this disadvantage.…”

Section: Its Sensitivity To Frequency Shifts (Eg [67])mentioning

confidence: 94%

“…The non-exploiting of channel diversity when channel coding is not applied (e.g. [8,91). Adding a CDMA component to the OFDM system is also a possibility to overcome this disadvantage.…”

Section: Rier Systemsmentioning

confidence: 99%

“…-e -jani N Ch,i(q')zr(av -Nq'+ A) (m). (8) In case of ideal subcarrier spacing AFT, = v / N = 1.0 the received signal is (9) and the implementation is very straight forward as shown in Figure 4. Here the received signal undergoes a similar sort of windowing procedure as it does in the transmitter (see Figure 2) before the FFT is performed.…”

Section: Fft-basementioning

confidence: 99%

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Flexible Implementation of Multicarrier Systems with Polyphase Filterbanks

Matheus

Kammeyer

Tuisel³

2000

Trans Emerging Tel Tech

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Abstract. This article will emphasize on how to efficiently implement multicamer (MC-) systems different from and alternative to OFDM with polyphase filterbanks. It will show that when using polyphase filterbanks this is an incomplex and flexible solution. It will be derived that with polyphase filterbanks an additional MC-system design parameter exists; not only spacings between adjacent subcarriers in integer multiples of the inverse MC-symbol duration are possible but that also non-integer multiples of the inverse MC-symbol duration are easily realizable.

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“…[8,91). Adding a CDMA component to the OFDM system is also a possibility to overcome this disadvantage.…”

Section: Its Sensitivity To Frequency Shifts (Eg [67])mentioning

confidence: 94%

“…The non-exploiting of channel diversity when channel coding is not applied (e.g. [8,91). Adding a CDMA component to the OFDM system is also a possibility to overcome this disadvantage.…”

Section: Rier Systemsmentioning

confidence: 99%

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Flexible Implementation of Multicarrier Systems with Polyphase Filterbanks

Matheus

Kammeyer

Tuisel³

2000

Trans Emerging Tel Tech

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“…As described in Section I, we are interested in shaping the ISI/ICI into a form that allows simple yet high-performance equalization. Between shaped responses which contain only ICI, only ISI, or joint ISI/ICI, we find ICI-only responses to be the most convenient: ICI-only responses can be optimally mitigated in a block-by-block manner, whereas ISI-only responses would require per-subcarrier sequence-detection and joint-ISI/ICI responses would require two-dimensional sequence-detection (e.g., [13]). For this reason, we focus on pulse designs that aim to suppress ISI completely and yield a convenient ICI support region.…”

Section: Pulse Designmentioning

confidence: 99%

“…Matheus and Kammeyer [12], [13] proposed a scheme based on Gaussian prototype pulses dilated to suppress ICI and/or ISI. In contrast, our pulses are not Gaussian-constrained and tolerate ISI/ICI within a target pattern.…”

mentioning

confidence: 99%

Max-SINR ISI/ICI-Shaping Multicarrier Communication Over the Doubly Dispersive Channel

Das

Schniter

2007

IEEE Trans. Signal Process.

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Abstract-For communication over doubly dispersive channels, we consider the design of multicarrier modulation (MCM) schemes based on time-frequency shifts of prototype pulses. We consider the case where the receiver knows the channel state and the transmitter knows the channel statistics (e.g., delay spread and Doppler spread) but not the channel state. Previous work has examined MCM pulses designed for suppression of inter-symbol/inter-carrier interference (ISI/ICI) subject to orthogonal or biorthogonal constraints. In doubly dispersive channels, however, complete suppression of ISI/ICI is impossible, and the ISI/ICI pattern generated by these (bi)orthogonal schemes can be difficult to equalize, especially when operating at high bandwidth efficiency. We propose a different approach to MCM pulse design, whereby a limited expanse of ISI/ICI is tolerated in modulation/demodulation and treated near-optimally by a downstream equalizer. Specifically, we propose MCM pulse designs that maximize a signal-to-interference-plus-noise ratio (SINR) which suppresses ISI/ICI outside a target pattern. In addition, we propose two low-complexity turbo equalizers, based on minimum mean-squared error and maximum likelihood criteria, respectively, that leverage the structure of the target ISI/ICI pattern. The resulting system exhibits an excellent combination of low complexity, low bit-error rate, and high spectral efficiency.

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Optimal design of a multicarrier systems with soft impulse shaping including equalization in time or frequency direction

Matheus

Kammeyer²

GLOBECOM 97. IEEE Global Telecommunications Conference. Conference Record

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Two-dimensional (recursive) channel equalization for multicarrier systems with soft impulse shaping (MCSIS)

Cited by 9 publications

References 8 publications

Flexible Implementation of Multicarrier Systems with Polyphase Filterbanks

Flexible Implementation of Multicarrier Systems with Polyphase Filterbanks

Max-SINR ISI/ICI-Shaping Multicarrier Communication Over the Doubly Dispersive Channel

Optimal design of a multicarrier systems with soft impulse shaping including equalization in time or frequency direction

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