frequency-selective-fading diversity
Optimizing time and space MIMO antenna system for frequency selective fading channels
... To determine , we can use either ray tracing (deterministic model) [26] or statistical approaches. In this paper, a statistical approach is used to allow easier control of channel parameters such as delay spread. ...
13
Review on STBC coded MISO and MIMO in Frequency Selective Wireless Fading Channel
... transmit diversity scheme is one example of a general technique known as Space Time Block ...provide diversity gain while maintaining orthogonality between code words after receiver ...same ...
5
Successive interference cancellation schemes for time-reversal space-time block codes
... assume frequency-flat channels and suffer performance degradation over frequency-selective ...for frequency-selective fading en- vironments has attracted great attention, and it ...
9
Digital Array MIMO Radar and its Performance Analysis
... (i.i.d.) frequency flat Rayleigh fading channels, MIMO target detection probability and receiver SNR increases as the number of antennas ...space selective because of the angle spread at the ...
17
Performance of multicarrier complementary coded CDMA under frequency selective Nakagami m fading channels
... In frequency-selective fading condi- tions, orthogonal restoring combining (ORC), maximal ratio combining (MRC), and minimum mean square error combining (MMSEC) have been a promising tech- nique in ...
9
Bit Error Rate Performance for Multicarrier Code Division Multiple Access over Generalized η-μ Fading Environment
... multipath fading the performance of the system ...of frequency selective generalized η-µ fading channel and multiple access interference caused by other active users to the desired ...
6
Super Orthogonal Block Codes with Multichannel Equalisation and OFDM in Frequency Selective Fading
... FNS fading channels when both OFDM and ME are employed for the FS fading channel ...same diversity order ...FNS fading scenario, although the scheme su ff ers some coding gain ...FS ...
10
Relay selection in cooperative networks with frequency selective fading
... multipath fading and increase energy efficiency [1,2]. To exploit spatial diversity in the absence of multiple antennas, several spatially separated single- antenna nodes can cooperate to form a virtual ...
16
1. A robust and efficient channel estimation scheme for ofdm systems in frequency selective fading channels
... Moreover, the transmission of data at higher speeds results in a thin multipath channel. The signal subspace attribute of the correlation matrix can be effectively mitigated when the construction of correlation matrix of ...
7
Effective Needs of Space-Time-Frequency Coding in MIMO-OFDM Communication over Frequency Selective Fading Channels
... for frequency selective fading channels" such as the space time code design for single carrier transmission over frequency selective fading ...and frequency ...
6
Performance Estimation of 2*4 MIMO-MC-CDMA Using Convolution Code in Different Modulation Technique using ZF Detection Scheme
... Rayleigh Fading Channel ...convert frequency selective wide-band carriers into parallel flat-fading narrowband carriers which are orthogonal in nature then this data reshaped to parallel to ...
5
Adaptive prediction, tracking and power adjustment for frequency non-selective fast fading systems
... fast- fading signal envelope observed in ...amplitude, frequency and phase of each component change on a much slower time scale, ...the fading coefficient can be predicted far beyond the coherence ...
5
Implementation of Transmit Diversity Schemes
... transmit diversity, in which the Space Frequency Block Codes (SFBC) are used to obtain diversity ...the frequency domain. In SFBC multiple flat fading channels can be obtained by ...
7
Analysis of SOSTTC-OFDM based on Least Squares Method
... flat fading [1], [2] (i.e. frequency non-selective fading) channels without temporal ...flat fading channel SOBC in the space and time domain show an improved coding gain and provide ...
6
Survey on Various Types of Noise and Methods for Noise Removal
... namely, frequency- dependent signal attenuation and noise, inter hop interference, half-duplex modem constraint, and large propagation delay, are taken into account in the ...
6
Spectrum - Sharing Multihop Cooperative Relaying Performance Analysis Using Cognitive Radio Networks
... ABSTRACT: Spectrum sharing networks with distributed AF relaying is used to improve the secondary rate and reduce the interference on the primary. In the asymptote of large number of relays optimal power strategy for the ...
6
Secured Communication over Frequency Selective Fading Channels: A Practical Vandermonde Precoding
... the frequency- selective BCC (40) is equivalent to the MIMO-BCC where the transmitter with N + L dimensions (antennas) sends messages to K receivers with N antennas each in the presence of the eavesdropper ...
19
DATA RATE ENHANCEMENT OF GSM USING OFDM TECHNIQUE
... Introduction: The ADAPTIVE- OFDM is a special case of multicarrier modulation in which serial stream of data is divided in parallel and modulated by orthogonal sub-carriers with partial overlapping frequency ...
13
Performance Analysis of Mimo-Wimax System Using Space Time Block Codes
... Wireless access networks like WiMAX provide an excellent opportunity for operators to participate in the rapid growth opportunities that exist in emerging markets. The mobile Worldwide Interoperability for Microwave ...
6
Analysis and implementation of OFDM system and channel estimation based IEEE 802 11A
... slot by averaging the channel estimates calculated from each pilot symbol. And the second step involves channel tracking or interpolation, in which the tracking of the time varying fading channel is realized ...
6