The next generation wireless communications systems require higher data rates transmission in order to meet the higher demand of quality services. Research in wireless digital communications techniques have been expending very rapidly in the last few decades, resulting more reliable wireless communication systems that operate at higher spectral efficiency. Since there have been an increased in ...

This paper proposes a CSMA/CD-R (Carrier Sense Multiple Access/Collision Detection with Reservation) protocol, designed for wireless network mobile robots under a distributed robot system without any centralized mechanism. It employs stations to reserve a communication channel after communication collision for the wireless communication of the distributed robot system. The effectiveness and app...

Timing and carrier synchronization is a fundamental requirement for any wireless communication system to work properly. Timing synchronization is the process by which a receiver node determines the correct instants of time at which to sample the incoming signal. Carrier synchronization is the process by which a receiver adapts the frequency and phase of its local carrier oscillator with those o...

We propose a downlink multiple-input multipleoutput (MIMO) multi-carrier code division multiple access (MCCDMA) system with adaptive beamforming algorithm for smart antennas. The algorithm used in this paper is based on the Least Mean Square (LMS), with pilot channel estimation (PCE) and the zero forcing equalizer (ZFE) in the receiver, requiring reference signal and no knowledge channel. MC-CD...

This paper models a multi-channel stabilized S-Aloha system with capture. A capture model for single packet reception in a multi-carrier stabilized S-Aloha network is first proposed. This model can be effectively used for a single and a multiple antenna base station (BS). An analytical model for multi-packet reception is also proposed for multi-antenna BS. In this framework the BS can use a lin...

This review work based on the Performance analysis of OAM-OFDM system in AWGN Channel. In Digital communication system with multi carrier modulation technique can play very important role in all phase of designing and engineering. In this work we discuss about the performance analysis of 16QAM-OFDM system. We compare the performance analysis of different technique used in the 16 QAM OFDM and di...

This paper presents a simulation model of multi-load AGV system with artificial intelligence controller that is dedicated to be used in work transport control. The single AVG system with multi-load mean of transport is obtained assuming that the carrier capacity is big-enough to carry many lots at the single route. This model consists of a fuzzy logic and a genetic algorithms technics that mini...

We obtain optimal resource allocation policies for a single user single-carrier system and a multiple-access multi-carrier-CDMA system when the transmitter adapts to the variations in the short-term mean (slow fade) in a combined slow and fast fading (composite fading) environment. For the single user system, we maximize the average throughput achieved by the user, while in the uplink MCCDMA sy...

As one of the techniques beyond 3G, because of the effective performance of high spectrum utilization and anti-fading for frequency selecting and adopted multi-carrier modulation technique that meets the requirement of the explosive traffic capacity, Orthogonal Frequency Division Multiplexing (OFDM) has carried great weight in wireless communications. This paper expounds OFDM technical characte...