The capacity region of a two-user Gaussian multiaccess channel with intersymbol interference (ISI), where the inputs pass through respective linear systems and are then superimposed before being corrupted by an additive Gaussian noise process, is found. A novel geometrical method is given to obtain the optimal input power spectral densities and the capacity region. This method can be viewed as ...

|Precoding at the transmitter side is a practicable method for transmission over intersymbol interference channels. In contrast to decision{feedback equalization no error propagation occurs and coded modulation can be applied as for the intersymbol interference free channel. In this paper, Tomlinson{Harashima precoding and exible precoding are analyzed and compared. The dualities and di erences...

A new technique for obtaining frequency-dependent magnitude and phase information across an optical channel is presented using tunable allpass optical filters and a detector with a small bandwidth relative to the full channel width. This technique has application to optical monitoring of intersymbol interference distortions, including chromatic and polarization-mode dispersion effects, and thus...

We investigate joint source channel coding for channels with intersymbol interference (ISI) where the source coder is a vector quantizer. In our previous work we used a block MAP equalizer, which takes into account the residual correlation between the VQ outputs and also provides for soft decisions to improve the performance. In this paper we propose the use of a vector channel approach and dis...

The recent digital transmission systems impose the application of channel equalizers with bandwidth efficiency, which mitigates the bottleneck of intersymbol interference for high-speed data transmission-over communication channels. This leads to the exploration of blind equalization techniques that do not require the use of a training sequence. Blind equalization techniques however suffer from...

ORTHOGONAL MULTIPLE CARRIER DATA TRANSMISSION Thomas Wiegand1 and Norbert J. Fliege2 1Telecommunications Institute University of Erlangen-Nuremberg Cauerstr. 7/NT, 91058 Erlangen, Germany [email protected] 2Telecommunications Institute Hamburg University of Technology Eissendorfer Str. 40, 21071 Hamburg, Germany [email protected] ABSTRACT Orthogonal multiple carrier d...

A maximum a posteriori probability (MAP) symbol decoding supplemented with iterative decoding is proposed as an effective mean for suppression of intrachannel nonlinearities. The MAP detector, based on Bahl-Cocke-Jelinek-Raviv algorithm, operates on the channel trellis, a dynamical model of intersymbol interference, and provides soft-decision outputs processed further in an iterative decoder. A...

Direct sequence (DS) code division multiple access (CDMA) is a promising technology for wireless communication with multiple simultaneous transmissions. The capacity of DS-CDMA is interference-limited and can therefore be increased by techniques that suppress interference. In this paper, an interference cancellation method is given. We propose a novel parallel interference cancellation detector...

Multiple Input Multiple Output (MIMO) technology is one of the most promising wireless technologies that can efficiently boost the data transmission rate, improve system coverage, and enhance link reliability. By employing multiple antennas at transmitter and receiver sides, MIMO techniques enable a new dimension– the spatial dimension – that can be utilized in different ways to combat the impa...