In this paper, we study the performance of the continuous phase modulation (CPM)-based orthogonal frequency division multiplexing (CPM-OFDM) system. Also, we propose a CPM-based single-carrier frequency domain equalization (CPM-SC-FDE) structure for broadband wireless communication systems. The proposed structure combines the advantages of the low complexity of SC-FDE, in addition to exploiting...

Orthogonal frequency division multiplexing (OFDM) is an attractive, promising and emerging technique which achieves high data rate in mobile multipath channels. LTE was the first technology to use OFDM. There are many more advantages of OFDM which includes immunity to multipath fading. High Peak to Average Power Ratio(PAPR) is the main disadvantage of OFDM-LTE Networks. This paper describes how...

GNSS Acquisition in fading and attenuated environments is challenging. In these situations, additional processing gain is required. A common method is to extend the coherent integration time. However, in weak signal situations, using only long coherent integration is limited by navigation data bit transitions and receiver oscillator instability. Using non-coherent and differentially coherent in...

We study the performance of a UMTS downlink, as achieved by a single-user (RAKE) and a multiuser (linear MMSE) receiver with adaptive modulation and multicode in the presence of multipath fading. We advocate an adaptive transmission scheme that varies the number of virtual users and the modulation spectral efficiency in order to optimize the system throughput. Two multipath channel models are c...

In this paper we propose a feedforward method to estimate the multipath delays in a fading channel at subchip resolution and able to deal with multipath merging phenomenon. The multipaths are searched in the envelope of the correlation function between the received signal and a reference signal. The correlation function is obtained in the oversampled domain and the resolution of the delay estim...

We study the performance of a DS-CDMA blind multiuser detector in multipath Rayleigh fading channels for high data rates where the delay spread can be larger than one symbol duration. We propose blind recursive minimum output variance detectors for multipath channels with an additional constraint on the energy of the filter tap weights. This constraint prevents the cancellation of the desired s...

Sensing coverage problem in wireless sensor networks is a measure of quality of service (QoS). Coverage refers to how well a sensing field is monitored or tracked by the sensors. Aim of the paper is to have a priori estimate for number of sensors to be deployed in a harsh environment to achieve desired coverage. We have proposed a new sensing channel model that considers combined impact of shad...

In this paper, we use a novel virtual branch technique to succinctly derive the mean and variance of the combiner output signal-to-noise ratio for hybrid selection/maximal-ratio combining in a multipath-fading environment.

Cognitive radio has more extensive application in recent years, and it may operate in complex wireless environmental condition such as communication systems with time-variant multipath flat-fading channel. As an essential technology for cognitive radio, most existing spectrum sensing methods are designed for time-invariant propagation channel; thus, it could be extremely difficult to achieve ac...