In a multi-rate DS-CDMA system with multiple modulation, modulation format is adjusted according to the data rate of each user while symbol duration is fixed for all users. In this paper, two types of multi-stage partial parallel interference cancellation (PIC) receivers are considered for multirate DS-CDMA system with multiple modulation: multi-stage PIC receiver with partial cancellation fact...

AT&T Labs – Research Florham Park, NJ 07932, USA ftim,thomas,rvc,[email protected] Abstra t | Convolutional coding as a means of error correction is widely used in mobile communications, where the effects of channel noise have to be taken into account. Channel decoders usually aim at minimizing the frame, symbol or residual bit error rate of the source bits. In this contribution we show how ...

We present many new results related to reliable (interactive) communication over insertiondeletion channels. Synchronization errors, such as insertions and deletions, strictly generalize the usual symbol corruption errors and are much harder to protect against. We show how to hide the complications of synchronization errors in many applications by introducing very general channel simulations wh...

New exact expressions are derived for the symbol error rate (SER) of M-ary quadrature amplitude modulation (MQAM) and the bit error rate (BER) of M-ary phase shift keying (MPSK) for L diversity reception in Rayleigh fading channels corrupted by additive white Gaussian noise (AWGN). The diversity techniques considered here are maximum ratio combining (MRC) and selection combining (SC). MRC with ...

The conventional space-time codes can provide a significant improvement in system performance only if the signal paths are spatially uncorrelated, a condition that is hardly met in practice. In this paper we mitigate this condition by combining a technique of eigenbeamforming, based on the channel correlation matrix, with orthogonal space-time block code (O-STBC) at the transmitter side of the ...

The performance of radial basis function decision feedback equalised burst-by-burst adaptive modulation is presented for transmission over dispersive wideband mobile channels. Radial Basis Function (RBF) network based channel equalisers have a close relationship with Bayesian schemes. The RBF decision feedback equaliser (RBF DFE) is capable of estimating the 'short term bit error rate' of the r...

This paper discusses the modeling and analysis of a systematic lossy source channel coding system for errorresilient video transmission. The systematic portion of the transmission consists of a video bitstream transmitted without channel coding over an error-prone channel. Error-resilience is achieved by transmitting a supplementary bitstream generated by Wyner-Ziv encoding of the video signal....

We investigate the joint effect of channel estimation and frequency flat transmitter and receiver I/Q imbalance on an Orthogonal Frequency Division Multiplex (OFDM) system. We assume independent fading with identically and independently distributed (i.i.d) mirror carrier channel coefficients. Closed form expressions for symbol error rate and bit error rate of M-QAMmodulation are derived. We con...

We have generated a single-wavelength data signal with a data capacity of 5.1 Tbit/s. The enabling techniques to generate the data signal are optical time-division multiplexing up to a symbol rate of 1.28 Tbaud, differential quadrature phase shift keying as data format, and polarisation-multiplexing. For the first time, error-free performance with a bit error rate less than 10(-9) is demonstrat...