Patteti Krishna

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Transmit diversity is created in the regular cooperative diversity (RCD) networks when the selected nodes assist the source by relaying its information signal to the destination using orthogonal channels to avoid co-channel interference. This decomposition is necessary because practical limitations in radio implementation prevent the relay from(More)
Third Generation Partnership Projects Long Term Evolution –LTE downlink multiuser Multiple Input Multiple Output (MIMO) systems are analyzed in this paper. Two spatial multiplexing and transmit diversity multiuser MIMO schemes .To achieve high throughput required by the downlink LTE system, Adaptive Modulation and Coding (AMC) has to ensure a Block Error(More)
The User Equipments (UE) nowadays are able to provide various internet applications and services that raise the demand for high speed data transfer and Quality of Service (QoS). Accordingly, next generation mobile communication systems driven by these demands are expected to provide higher data rates and better link quality compared to the existing systems.(More)
This paper, we evaluate the performance study of Long Term Evolution-LTE downlink with multiple input and multiple outputs (MIMO) system. MIMO transmissions schemes include transmit diversity and spatial multiplexing and MIMO detection schemes such as zero forcing and soft spheres decoding (SSD). The performance metrics considered are throughput and bit(More)
The main goal of this paper is to understand the effects of frequency offset on orthogonal frequency division multiplexing (OFDM) systems and to present frequency offset estimation techniques so that we can correct for their effects. The performance of each technique is compared under various conditions. The performance of the estimators is presented in(More)
Higher the data rates and spectrum efficiency of wireless mobile communications have been significantly improved over the last decade, such as 3GPP Long-Term Evolution (LTE) and terrestrial digital TV broadcasting which are sophisticatedly developed using OFDM. Orthogonal frequency division multiplexing (OFDM) is a modulation technique that achieves high(More)
In this paper, we analysis the performance of Multiuser Multiple input Multiple output (MU-MIMO) Schemes in Long term evolution (LTE). As the performance metric, Block error rate and throughput are evaluated in terms of Signal to Noise Ratio (SNR) for different MIMO Schemes defined as in LTE. To achieve the high throughput required by the downlink LTE(More)
This paper examines the downlink throughput evaluation of Time division duplex Long Term Evolution (TDD-LTE). The system efficiency is assumed to be equal to the Shannon boundary. Pilot tones etc. is taken from TDD-LTE. Furthermore the packet header is part of the calculated throughput as it is highly dependent on the specific network. A large number of(More)
In this paper, Long Term Evolution (LTE) Cellular networks provides higher bit rates and consequently higher spectral efficiencies. Quadrature Amplitude Modulation has been adopted by most wireless communication standards such as Long Term Evolution (LTE). We analyses the Bit error rate (BER) of M-ary QAM in both multipath fading channels such as Rayleigh(More)
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