The microwave Doppler radar sensor enables a non-contact approach for measuring movement in various applications. One of the most challenging issues is radar signal demodulation because it requires accurate DC offset compensation. Existing works either require a complicated setup procedure or are sensitive to environmental changes. In this reported work, a compressed sensing based approach to e...

The modulated carrier is often interfered by any type of noises. The co-channel separation system is a demodulation function with dominant and subdominant signals using the receiver of modulation process system by operating at the same as the carrier modulation system. In this thesis, we adopted the field-programmable gate array (FPGA) design platform to develop and achieve the co-channel separ...

A novel demodulation scheme for interferometers with optical phase modulation is described. The optical phase shift is measured by mixing a train of square digital pulses with a photodetector current and adjusting the pulse spacing by using an electronic closed loop. The optical phase shift is tracked with deviation less than 0.007 rad, which can be easily corrected by using a look-up table. An...

A multiple-input multiple-output (MIMO) wireless transmission system with continuous phase modulation (CPM) is considered. A novel MIMO CPM receiver with incoherent modulation is presented. The incoherent demodulation of CPM allows an uncomplicated handling of a frequency offset compared to coherent approaches requiring exact knowledge of the carrier frequency. Blind signal separation (BSS) is ...

The higher order differential energy operator (DEO), denoted via Υk(x), is an extension to the second order famous Teager-Kaiser operator. The DEO helps measuring the higher order gauge of energy of a signal which is useful for AM-FM demodulation. However, the energy criterion defined by the DEO is not compliant with the presumption of positivity of energy. In this paper we introduce a higher o...

Efficient use of a deep-space optical communications channel requires changes to the duty cycle of the modulation as the signal and noise powers change. This can be facilitated by modulating the signal with pulse-position-modulation (PPM), supporting multiple PPM orders. To implement iterative demodulation, which is required by certain error-correction-codes to obtain near-capacity performance,...

This paper presents a detailed analysis of the working of Vertical Bell Laboratories Layered Space Time (VBLAST) coding technique by the support of SISO and MIMO systems. In this paper we compared the results of Bit Error Rate (BER) values in SISO and MIMO system by the help of Zero Forcing (ZF) equalizer. A single step demodulation and decoding operation may suffer a great downfall in performa...

Abstract—Since radio channels available have been assigned to traditional narrowband communication systems the only solution to establish new radio communication links is the frequency reuse. This has to be achieved without causing interference in the conventional radio systems. Ultra WideBand (UWB) radio uses extremely wideband wavelets to decrease the Power Spectral Density (psd) of radiated ...

Beamforming techniques based on sigma-delta modulation (SDM) have been proposed to reduce the hardware complexity of conventional multi-bit digital delay-sum beamformer, in which beamforming operation is performed upon over-sampled single bit sequences obtained by applying SDM to the received signals from each array elements. In conventional single bit SDM beamforming, the single bit sequence i...

The received power imbalance (RPI) effect exists in multiple antennas wireless communications system due to design flaw, operator’s negligence etc. The range of RPI can be from −10 dB to 0 dB and if the RPI information is not available at the receiver terminal, it can implement turbo iterative receiver by concatenating multi-input and multi-output (MIMO) orthogonal frequency division multiplexi...