Thanks to their high bandwidth ability, Asymmetric Digital Subscriber Lines (ADSL) and Very high speed DSL (VDSL) am access technologies that permit the transmission of several applications simultaneously on telephonic subscriber lines. Considering that these applications may require a different Quality of Service (QoS), and particularly different Bit Error Rates (BER), for transmission, this p...

The transmission over the memoryless additive white Class-A noise (AWCN) channel is considered. For uncoded transmission, an exact expression for the symbol error rate is derived. For coded transmission, the Chernoff bound on the pairwise error probability is calculated and the performance achieved on the real and the complex AWCN channels is compared. Moreover, a lowcomplexity, suboptimum deco...

The OFDM-based MC-CDMA/FDMA transmission scheme is candidate for the air-interface of beyond 3G mobile communications. An efficient adaptive subband allocation (ASBA) approach has been recently shown to provide a considerable gain in the uncoded system performance. In this paper, adaptive coding is proposed for application in conjunction with ASBA. This is proved to yield a significant performa...

of this work is to assess the impact of such MU detecPacketized random access based on Code Division Multiple Access (CDMA) is considered. Our primary aim is to assess the impact of (uncoded) multi-user (MU) detectors on the performance of CDMA with slotted ALOHA. The impact of respective multiple packet reception capability for the matched filter and MMSE detector on delay/throughput improveme...

In this paper we develop formulas for the probability density function (PDF) of the reliability metrics in bitinterleaved coded modulation (BICM) for arbitrary M-ary quadrature amplitude modulation (M-QAM) with Gray mapping. The advantage of this approach over an entirely general one proposed previously, is that the resulting formulas are obtained without resorting to any algorithmic steps. We ...

We examine a specific strategy of using synchronization (sync) markers for error containment in compressed data, using a model that separates the data-compression and error-containment stages. We examine the trade-off between rate and error performance, determine classes of sync markers that give equivalent performance, and examine the optimum choice of sync marker and data block length. The pe...

We have investigated coding methods that aim at achieving the Costa capacity. First we have considered the uncoded case to determine what can be gained from coding. After that we have designed codes with a trellis structure that are combined with a two-level quantizer at the transmitter side. Simulations are carried out to determine the coding gains of these methods. We have focussed on vector ...

This paper investigates the application of 16-APSK modulation to aeronautical mobile telemetry. The peak-to-average power ratio vs. code rate tradeoff is mapped to an optimization problem involving spectral efficiency and the constellation parameters. The optimization results produce a theoretically optimum solution that is 3.95 times more spectrally efficient as uncoded SOQPSKTG. When implemen...

The single carrier system with cyclic prefix (SC-CP) has been demonstrated to outperform the OFDM system through simulations. In this paper, we consider minimum mean squared error (MMSE) receivers for the SC-CP system. We show analytically that, for uncoded QPSK symbols, the SC-CP system with an MMSE receiver has a smaller bit error rate (BER) than the OFDM system for all SNR.

-In this paper, we will use the construction technique proposed in [1] to construct multidimensional trellis coded modulation (TCM) codes for both the additive white Gaussian noise (AWGN) and the fading channels. Analytical performance bounds and simulation results show that these codes perform very well and achieve significant coding gains over uncoded reference modulation systems. In addition...