Channel equalization and identi cation appear as key issues in improving wireless communications. It is known that the linearization of the GMSK modulation (used in the European standard GSM) leads to a continuous phase OQPSK which can be considered as a Minimum Shift Keying (MSK) modulation. Thus methods of equalization and identi cation when the channel is input by MSK modulated signals is wo...

Satellite transmissions classically use constant amplitude linear modulation schemes, such as M-state phase shift keying (M-PSK), because of their high robustness to amplifier non-linearities. However, other modulation formats are interesting in a satellite transmission context. For instance, non-linear modulations such as Gaussian minimum shift keying (GMSK) present a higher spectral efficienc...

In this paper, we consider multiple bit differential detection (MBDD) of differentially encoded shapedoffset quadrature phase-shift keying (SOQPSK) over slow fading channels, especially Rayleigh fading channels. SOQPSK is a highly bandwidth efficient and popular form of constant envelope continuous phase modulation (CPM). We present two versions of the MBDD algorithm: the full-size version (FMB...

The relationship of filter bank trees to wavelet packet trees for subspaces, decimation operators, and coordinates of the projections of a function onto the subspaces is briefly explained. Two designs for the filter banks are summarized and the equations for the designs are provided. For one of these the prototype filters are all the same, and for the other they are the same at each level of th...

Westinghouse Electric Corporation Communication Division under NASA contract NAS3-25865 developed a proof-of-concept (POC) multichannel demultiplexer implemented as an acousto-optic radiofrequency (RF) spectrum analyzer. A detailed analysis of the experimental results indicate that the expected degradation caused by the acousto-optical channelizer is approximately 2.0-dB degradation at 10-5 bit...

This paper presents a detailed study on comparison of different remote monitoring systems. There are many systems for remote monitoring and control, designed as either commercial products or experimental research platforms. It is noticed that most of the research are carried out in categories such as Internet based Monitoring via Servers, GPRS modems, etc. There are different other approaches f...