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Spatial multiplexing and Receive Diversity in Wimax

Spatial multiplexing and Receive Diversity in Wimax Spatial multiplexing WiMAX also supports spatial multiplexing, where multiple independent streams are transmitted across multiple antennas. If the receiver also has multiple antennas, the streams can be separated out using space-time processing. Instead of increasing  diversity, multiple antennas in this case are used to increase the data rate … Read more

Advanced Antenna Systems,Transmit diversity and Beamforming in Wimax

Advanced Antenna Systems,Transmit diversity and Beamforming in Wimax Advanced Antenna Systems The WiMAX standard provides extensive support for implementing advanced  multiantenna solutions to improve system performance. Significant gains in overall system capacity and spectral efficiency can be achieved by deploying the optional advanced antenna systems (AAS) defined in WiMAX. AAS includes support for a variety … Read more

WMAN Standardization

Here I Write about WMAN Standardization Which is universally design and fixed for all Operator. Let’s Check in Detail. WMAN Standardization is inherited from 802.16 standard family CPE: Customer Premises Equipment AAS: Adaptive Antenna System OFDM: Orthogonal Frequency Division Multiplex QAM: Quadrature Amplitude Modulation BPSK: Binary Phase Shift Keying ETSI has defined two specifications, Hiper … Read more

LTE Layer 2 user plane protocol stack in detail

LTE Layer 2 user plane protocol stack in detail LTE user Layer 2 Protocol stack-the plan is composed of three substrates, as shown in the figure. Packet layer packet data convergence Protocol (PDCP) : this layer processes messages resource control (RRC) in the control plan and packages of Internet Protocol (IP) addresses in the user’s … Read more

Transmit Diversity Gain in LTE

Transmit Diversity Gain in LTE In Long-Term Evolution (LTE) wireless communication systems, transmit diversity gain plays a crucial role in enhancing the reliability and performance of data transmission. Transmit diversity involves the use of multiple antennas at the transmitter to improve the quality of the received signal at the receiver. One common technique employed in … Read more

Multi-antenna Techniques LTE to improve the downlink performance

Multi-antenna Techniques LTE to improve the downlink performance There are five methods of multiple antennas have been defined for the LTE downlink to improve the performance: Receive diversity at the mobile Transmit diversity using SFBC at the eNB (evolved Node B) MIMO spatial multiplexing at the eNB, for one or two users Cyclic Delay Diversity … Read more

How and What Spatial Diversity Antenna Systems in GSM

How and What Spatial Diversity Antenna Systems in GSM The spatial diversity antenna system is constructed by physically separating two receiving base station antennas. Here I write on spatial diversity antenna system criteria, configuration. SPATIAL DIVERSITY ANTENNA SYSTEMS Once they are separated far enough, both antennas receive independent fading signals. As a result, the signals … Read more

The Difference Between Line Of Sight and Non-Line Of Sight

The Difference Between Line Of Sight and Non-Line Of Sight Line of Sight (LOS): In LOS communication, there is a direct, unobstructed path between the transmitter and receiver. This type of communication is typically more reliable and offers higher data transfer rates because there are minimal obstacles in the signal’s path. LOS is commonly used … Read more

OFDM Receiver and How it work for LTE?

The receiver is like in any other radio system the more complicated part. In radio systems and of course also OFDM there are two special points a receiver has to pay attention to: time/phase and frequency synchronization. Both are crucial for the performance of the receiver. A receiver gets its input from the antenna (or … Read more

Which Types of Antennas Used in WIMAX ?

WiMAX antennas, just like the antennas for car radio, cell phone, FM radio, or TV, are designed to optimize performance for a given application. The figure above illustrates the three main types of antennas used in WiMAX deployments. From top to bottom are an omni directional, sector and panel antenna each has a specific function. … Read more