By using a pulse amplitude modulation representation of the binary continuous phase modulation signals, we develop a new optimum Viterbi sequence detector and a near optimum Viterbi receiver with low complexity. Also, for the modulation index 0.5 where a linear receiver can be used, a minimum mean-squared error linear receiver filter is derived. Their performance is analyzed. The Gaussian minim...

This work is motivated by the need to understand the fundamental limit of channel capacities of optical fiber communication channels where amplified spontaneous emission (ASE) noise is dominant and to understand how much has been achieved by the stateof-the-art forward error correction (FEC) coding techniques. Two most commonly used channel models, the Chi-square channel and its Gaussian approx...

We identify the common underlying form of the capacity expression that is applicable to both cases where causal or non-causal side information is made available to the transmitter. Using this common form we find that the capacity with causal and non-causal side information are identical when all the transmitter side information is also made available to the receiver. A genie-aided outerbound is...

We investigate massive multiple-input-multipleoutput (MIMO) uplink systems with 1-bit analog-to-digital converters (ADCs) on each receiver antenna. Receivers that rely on 1-bit ADC do not need energy-consuming interfaces such as automatic gain control (AGC). This decreases both ADC building and operational costs. Our design is based on maximal ratio combining (MRC), zero-forcing (ZF), and least...

Linear least squares estimation techniques can be used to enhance suppression of narrowband interference in direct-sequence spread-spectrum systems. Nonlinear techniques for this purpose have also been investigated recently. Here, we derive maximum-llkelihood receivers for direct-sequence Signal in Gaussian interference with known second order characteristics. It is shown that if the receiver u...

The perfomance of a class of communication systems is investigated in a probabilistic framework. We investigate the bit error probability of the optimal as well as approximately optimal receivers. In general the latter turn out to be unavoidable due to the computational complexity of the former. We investigate a certain class of communication schemes including chaotic systems. Nonlinear filteri...

For implementing an optical free-space transmission system at data rates up to 10 Gbit/s, commercially available devices developed for terrestrial fiber optic applications may be employed to advantage. We designed, set up and tested a breadboard consisting of an NRZ/RZ transmitter with a booster amplifier of 1 Watt optical output power and an optically preamplified direct detection receiver. Th...

We present a methodology for OFDM link capacity and bit error rate calculation that jointly captures the aggregate effects of various real life receiver imperfections such as: carrier frequency offset, channel estimation error, outdated channel state information due to time selective channel properties and flat receiver I/Q imbalance. Since such an analytical analysis is still missing in litera...

— An average Transmitted-Reference (TR) receiver scheme based on orthogonal codes is proposed for improving the bit error rate (BER) performance and the transmitting rate of Ultra-wideband (UWB) TR receiver systems in coal mine. Orthogonal codes are used for modulating the reference pulses and the data pulses in each frame of every bit. Since the orthogonality of the two codes, the inter-pulse...

A lower bound and the union upper bound of the bit error rate (BER) of the maximum-likelihood (ML) receiver of an optical On/Off-Keying (OOK) system is derived in this paper. Combining the two bounds, the BER of the ML receiver can be estimated.