This paper proposes a novel digital receiver, based on a multilayer perceptron neural network architecture, which works in a radio communications environment. Training is carried out by the variable learning rate back-propagation algorithm with momentum in a supervised manner and a batch training mode. We present computer simulation results comparing the performance of this receiver against the...

This paper describes a spread-spectrum downlink RAKE receiver that computes a data detection in the frequency domain. We assume a pilot signal is transmitted with data signals for channel sounding. The pilot signal does not degrade the receiver bit error rate (BER) performance because the receiver estimates the pilot signal and subtracts the estimated pilot signal from the received signal befor...

The design and simulation of coding schemes, medium access control and link layer protocols for future industrial wireless local area networks can be supported by some understanding of the statistic properties of the bit error patterns delivered by a wireless link (which is an ensemble of transmitter, channel, receiver, modems). We present results of bit error measurements taken with an IEEE 80...

The performance of coherent antipodal chaos-shift-keying (CSK) communication systems in a multipath channel is evaluated. A two-ray independent Rayleigh fading channel model is considered. Also studied is the performance when a Rake demodulator is employed. The analytical method for computing the bit error rate (BER) of such systems is derived. The theoretical BER results are presented and comp...

We introduce the task of random-receiver quantum communication, in which a sender transmits message to receiver chosen from list n spatially separated parties. The choice is unknown sender, but known by parties, who coordinate their actions exchanging classical messages. In normal conditions, communication requires noiseless channel each receivers. contrast, we show that can take place through ...

We consider algebras with a single n-ary operation and a certain type of associativity.We prove that up to isomorphism there are exactly 5 of these associative mono-n-ary algebras with 2 elements for even n ≥ 2 and 6 for odd n ≥ 3. These algebras are described explicitly. It is shown that a similar result is impossible for algebras with at least 4 elements. An application concerning the assignm...

An 8-PAM CMOS transceiver is described in this paper. Pre-emphasis is implemented without an increase in DAC resolution or digital computation. The receiver oversamples with three fully differential 3-bit ADCs. The prototype transmits at up to 1.3 Gb/s and has a measured bit error rate of less than 1 in 10 for an 810-Mb/s pseudorandom bit sequence transmission. The device, packaged in a 68-pin ...

This paper presents a methodology to calculate the bit-error rate for the data transmission in the upstream direction of Gigabit PON systems. In traditional optical receivers, the signal consists of a continuous bit stream. In the upstream direction of a PON however, the signal consists of a succession of packets with varying amplitudes. Hence the receiver needs to quickly extract the decision ...

This paper demonstrates a Ka-band CMOS phased-array receiver capable of generating four balanced beams from two inputs. A passive four-beam symmetrical differential network is proposed to distribute input signals eight channels and facilitate beam generation at the outputs in receiver. The detailed design optimization are presented. Using 6-bit vector-modulated phase shifter 5-bit switched-type...