Unified spatio-temporal frequency domain equalization for multi- and single-carrier CDMA systems

Brühl, Lars; Rembold, Bernhard

doi:10.1109/vetecf.2002.1040684

Cited by 10 publications

(9 citation statements)

References 3 publications

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“…But on the other side, the reciprocity of channel and transceiver and a constant channel between up-and downlink are required. The underlying system model of the digital hardware allows single-and multicarrier (OFDM) transmission with the same digital hardware architecture [1]. For both transmission schemes, equalization is performed in the frequency domain.…”

Section: Overview Of the Saba Real-time Mimo Testbedmentioning

confidence: 99%

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SABA: A Testbed for a Real-Time MIMO System

Borkowski

Brühl²,

Degen

et al. 2006

EURASIP J. Adv. Signal Process.

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The growing demand for high data rates for wireless communication systems leads to the development of new technologies to increase the channel capacity thus increasing the data rate. MIMO (multiple-input multiple-output) systems are best qualified for these applications. In this paper, we present a MIMO test environment for high data rate transmissions in frequency-selective environments. An overview of the testbed is given, including the analyzed algorithms, the digital signal processing with a new highly parallel processor to perform the algorithms in real time, as well as the analog front-ends. A brief overview of the influence of polarization on the channel capacity is given as well.

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Section: Overview Of the Saba Real-time Mimo Testbedmentioning

confidence: 99%

“…EURASIP Journal on Applied Signal Processing H W d (1) = s (1) d (K) = s (K) n x (1) x (M) FFT FFT IFFT IFFT d (1) d (K) . .…”

mentioning

confidence: 99%

SABA: A Testbed for a Real-Time MIMO System

Borkowski

Brühl²,

Degen

et al. 2006

EURASIP J. Adv. Signal Process.

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“…As can be seen in Equations (23)(24)(25)(26), all subcarriers contribute to the SNR or SNIR of the transmitted symbols. Thus, frequency diversity is exploited inherently when using single-carrier transmission.…”

Section: Single-carrier Transmissionmentioning

confidence: 99%

“…As can be seen in Equation (30), the SNR of each single symbol depends on the subcarriers it has been transmitted over, in contrast to the SNR for single-carrier transmission in Equation (24). When using no spreading, each symbol is transmitted over only one subcarrier.…”

Section: Single-carrier Transmissionmentioning

confidence: 99%

“…However, the same holds for the windowing area commonly used in OFDM. This generalized approach allows a unified hardware implementation for both multi-and single-carrier transmission [24]. Thus, both transmission schemes are aware of exactly the same effective coefficients of a baseband to baseband channel including all effects of oversampling and pulse shaping at the transmitter as well as aliasing by subsampling at the receiver side.…”

Section: Implementation Issuesmentioning

confidence: 99%

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Multi-user detection in OFDM systems using CDMA and multiple antennas

Degen¹,

Br�hl²

2003

Eur. Trans. Telecomm.

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SUMMARYThis paper deals with linear multi-user detection in orthogonal frequency division multiplexing (OFDM) systems. The separation of concurrently transmitted signals is based on space division and code division multiple access (SD/CDMA). The examined OFDM schemes are compared against frequency domain equalization for single-carrier transmission schemes (SC/FDE). Both show strong similarities. Therefore in this paper, we focus on a unified treatment of multi-user detection systems based on OFDM or SC/FDE. The trade-off between exploitation of diversity and user separation is analyzed for different spreading techniques and a varying number of receive antennas. The performance is evaluated in terms of both uncoded and coded bit error ratio (BER). Furthermore, a novel time domain spreading technique for OFDM systems is proposed for which the peak-to-average transmitter power ratio (PAPR) is independent of the applied spreading code.

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Multi-user detection in OFDM systems using CDMA and multiple antennas

Degen

Brühl

2003

5th European Personal Mobile Communications Conference 2003

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Unified spatio-temporal frequency domain equalization for multi- and single-carrier CDMA systems

Cited by 10 publications

References 3 publications

SABA: A Testbed for a Real-Time MIMO System

SABA: A Testbed for a Real-Time MIMO System

Multi-user detection in OFDM systems using CDMA and multiple antennas

Multi-user detection in OFDM systems using CDMA and multiple antennas

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