Virtual Iterative Precoding Based LTE POMA Channel Estimation Technique in Dynamic Fading Environments
V. Madhu Kumar1, T.V. Ramana2

1T. Venkata Ramana, Department of Electronics & Communications Engineering, Nagarjuna University, Andhra Pradesh, India.
2V. Madhu Kumar, Research Scholar, Department of Wireless Communication, GITAM University, Visakhapatnam.

Manuscript received on 17 April 2019 | Revised Manuscript received on 24 April 2019 | Manuscript published on 30 April 2019 | PP: 588-593 | Volume-8 Issue-6, April 2019 | Retrieval Number: E2876038519/19©BEIESP
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Abstract: A method of channel estimation based on antenna characteristics in angular domain is proposed in this paper. The transmitter and receiver antenna characteristics are sampled with finite sampling frequency and finite bandwidth. The physical channel perceived by the system is a filtered channel, causing the physical channel to lose its strength into multiple taps with dominant channel power, which estimate few unknown subcarriers. These taps in physical channel are analogous to virtual in the discrete-time domain perceived by the system, which draws less gains from the antenna sections. By the proposed work, these virtual channels improves the gain and attenuation of signal transmitted through iterative precoders of Long Term Evolution (LTE) transmitters and receivers set of antennas. An analogy of the above proposed precoding technique is drawn with the timedomain Position-orthogonal multiple access (POMA) path channel model through a filtered channel estimation with infinite temporal resolution of the sampled signal. Proposed model improves the performance of LTE communication system with POMA antennas by providing a perfect channel state information (CSI) including spatial precoding and beamforming. The imple-mentation of the proposed model is simulated in a new dynamic mxn tabs fading scenario path. The comparative results shows a better performance than the existing surveyed methods. 
Keyword: LTE, Angular Domain, Virtual, Multiple Access, Fading.
Scope of the Article: Virtual & Overlay Networks