Background/Objective: The important challenge for the realization of hearing aids is small size, low cost, power consumption, and better performance, etc. Keeping these requirements in view this work concentrates on VLSI (Very Large Scale Integrated) implementation analog circuit that mimics PPSK (Passive Phase Shift Keying) demodulator with a pass filter. Methodology: This research deals RF Co...

In this paper we consider reciever design for frequency hopping orthogonal frequency-division multiple access system [2]. We propose new demodultaion algorithm that can increase the number of simultaneous transmissions with the same bit error rate. This algoritm can use any statistic that can test equality of emprical distribution funcions. We have used Kolmogorov-Smirnov statistic in this pape...

A description of the signal processing stage of an on-board integrated VLSI multi-carrier demodulator at the demultiplexing level is presented in this paper, along with a description of the optimization procedure that has been developed for the signal processing functions. The varying adjacent carrier interference and channel noise distribution are modeled to provide the best performing demulti...

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 have constructed a fully functional, fully integrated radio receiver from a single carbon nanotube. The nanotube serves simultaneously as all essential components of a radio: antenna, tunable band-pass filter, amplifier, and demodulator. A direct current voltage source, as supplied by a battery, powers the radio. Using carrier waves in the commercially relevant 40-400 MHz range and both freq...

!L., ~ ~ Absrrncr-In this paper, we study the density of extrinsic infor--I !-: inno..nr&*: : I *-hloduwlon L : f. ' b! axnonutory-; D e h O . m r ~ , ~. i matiou at the output of the demodulator of an iterative MIMO ~ ~ L---+ processing system. In particular, if the n priori information is Gaussian distributed, the conditions under which the extrinsic information is also approximately Gaussian...

We studied a device that is commonly used for amplitude demodulation of respiratory muscle electromyograms (EMG). This device contains a rectifier and a low-pass filter called a modified third-order Paynter filter. We characterized this filter and found that it has good transient characteristics that suit its task as an EMG demodulator, but it has poor high-frequency attenuation that passes int...

A lot of hardware components are used to make a conventional radio communication system, the complexity of these hardware can be reduced with help of Software Defined Radio (SDR) which is a form of wireless communication. Software Defined Radio implemented system allows us to make alteration in it or operate it with help of a software, thus making the system flexible and reconfigurable. The sys...

The growing number of different mobile communications standards calls for inexpensive and highly flexible receiver architectures supporting all standards. The direct conversion receiver is a very attractive candidate to reach this goal. However, unavoidable imbalances between the Iand the Qbranch of the I/Q demodulator lead to a significant performance degradation at the reception of OFDM signa...

We examine the average-case performance of a code-division multiple-access (CDMA) multiuser demodulator in which quantum fluctuations are utilized to demodulate the original message within the context of Bayesian inference. The quantum fluctuations are built into the system as a transverse field in the infinite-range Ising spin glass model. We evaluate the performance measurements by using stat...