Hybrid precoding with phase shifter reduction for 5G massive antenna multi-user systems in millimetre wave

Background : Millimeter wave technology is the emerging technology in wireless communication due to increased demand for data traffic and its numerous advantages however it suffers from severe attenuation. To mitigate this attenuation, phased antenna arrays are used for unidirectional power distribution. An initial access is needed to make a connection between the base station and users in millimeter wave system. The high complexity and cost can be mitigated by the use of hybrid precoding schemes. Hybrid precoding techniques are developed to reduce the complexity, power consumption and cost by using phase shifters in place of converters. The use of phase shifters also increases the spectral efficiency. Objective: Analysis of Optimum Precoding schemes in Millimeter Wave System. Method: In this paper, the suitability of existing hybrid precoding solutions are explored on the basis of the different algorithms and the architecture to increase the average achievable rate. Previous work done in hybrid precoding is also compared on the basis of the resolution of the phase shifter and digital to analog converter. Results: A comparison of the previous work is done on the basis of different parameters like the resolution of phase shifters, digital to analog converter, amount of power consumption and spectral efficiency. Table 2 shows the average achievable rate of different algorithms at SNR= 0 dB and 5 dB. Table 3 also compares the performance achieved by the hybrid precoder in the fully connected structure with two existing approaches, dynamic subarray structure with and without switch and sub connected or partially connected structure. Table 4 gives the comparative analysis of hybrid precoding with the different resolutions of the phase shifter and DAC. Conclusion: In this paper, some available literature is reviewed and summarized about hybrid precoding in millimeter wave communication. Current solutions of hybrid precoding are also reviewed and compared in terms of their efficiency, power consumption, and effectiveness. The limitations of the existing hybrid precoding algorithms are the selection of group and resolution of phase shifters. The mm wave massive MIMO is only feasible due to hybrid precoding.

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Millimetre-wave wideband reflection-type CPW MMIC phase shifter

Electronics Letters ◽

10.1049/el:20020256 ◽

2002 ◽

Vol 38 (8) ◽

pp. 374 ◽

Cited By ~ 5

Author(s):

Hong-Teuk Kim ◽

Dae-Hyun Kim ◽

Youngwoo Kwon ◽

Kwang-Seok Seo

Keyword(s):

Phase Shifter ◽

Millimetre Wave

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Millimetre-Wave Planar Phased Patch Array with Sidelobe Suppression for High Data-Rate Transmission

International Journal of Antennas and Propagation ◽

10.1155/2019/7691912 ◽

2019 ◽

Vol 2019 ◽

pp. 1-7

Author(s):

Hung-Chen Chen ◽

Tsenchieh Chiu ◽

Ching-Luh Hsu

Keyword(s):

Power Distribution ◽

Phase Shifter ◽

Radiation Power ◽

Data Rate ◽

High Data Rate ◽

Sidelobe Suppression ◽

Millimetre Wave ◽

High Data ◽

Rate Transmission ◽

Digitally Controlled

A design of 38 GHz planar phased patch array with sidelobe suppression for data-rate enhancement is proposed in the paper. The proposed array is formed of three 24-element subarrays of patches. Each patch has its own transmit/receive modules (TRM) consisting of a digitally controlled attenuator and phase shifter. In order to achieve high data-rate communications, the noise, especially due to the undesired signals received from the sidelobes, should be reduced with high sidelobe suppression of subarray. The sidelobe suppression of the proposed subarray is first improved to 17.92 dB with a diamond-shaped aperture and then better than 35 dB with a tapered radiation power distribution. The excellent sidelobe suppression of the antenna array is essential for the beam-division multiplexing applications when the signal sources are close to each other. The proposed design is validated experimentally, including the data-rate measurements showing that the 7 Gbps data transmission can be achieved with sufficient sidelobe suppression of the proposed design.

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Hardware Phase Shift Hybrid Precoding Designs For Multi-User Massive MIMO Systems

Journal of Physics Conference Series ◽

10.1088/1742-6596/2134/1/012027 ◽

2021 ◽

Vol 2134 (1) ◽

pp. 012027

Author(s):

H Ayad ◽

M Y Bendimerad ◽

F T Bendimerad

Keyword(s):

Spectral Efficiency ◽

Massive Mimo ◽

Phase Shifter ◽

Mimo Systems ◽

Digital Processing ◽

Hybrid Precoding ◽

Double Phase ◽

High Spectral Efficiency ◽

Fixed Phase ◽

Configuration Simulation

Abstract Hybrid precoding is a challenging design for massive MIMO systems that involves a combination of analog and digital processing, aiming to maximize the spectral efficiency (SE). Most works on hybrid precoding focus on the single phase shifter (SPS) implementation to adapt the phase from RF chains to antennas. In this paper we propose to develop the double phase shifter (DPS) and the fixed phase shifter (FPS) in both single-path and multi-path configuration. Simulation results certify a significant improvement for both proposed implementations with high hardware efficiency (HE) and high spectral efficiency especially in multi-path environment.

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HP-SFC Algorithm for MmWave Massive MIMO Hybrid Precoding Systems

10.21203/rs.3.rs-513331/v1 ◽

2021 ◽

Author(s):

Ruiyan Du ◽

Huajing Liu ◽

Fulai Liu ◽

Dan Li

Keyword(s):

Optimization Problem ◽

Phase Shifter ◽

Least Square ◽

Efficiency Improvement ◽

Hybrid Precoding ◽

Precoding Matrix ◽

Energy Efficiency Improvement ◽

Analog Switch ◽

Binary Constraint ◽

Fully Connected

Abstract This paper presents an alternating iteration hybrid precoding algorithm for the switch network-based dynamic fully-connected (SFC) structure, namely HP-SFC algorithm. Firstly, based on the sparsity of switch network, the optimization problem of the analog switch precoding matrix is transformed into a binary dictionary updating problem, which avoids to deal with the binary constraint straightly. Then, the optimization problem of the analog phase shifter (PS) precoding matrix is modeled as a quadratic unimodular programming problem by the vectorization of the analog PS precoding matrix. So that the analog PS precoding matrix can be readily optimized. Finally, the analog switch precoding matrix, the analog PS precoding matrix and the digital precoding matrix are alternately optimized via the block coordinate descent, the generalized power method and the least square, respectively. Theoretical analysis and simulation results show that the proposed algorithm can provide brilliantly hybrid precoding performence campared with the previous works, for example: 1) it reduces the hybrid precoding matrix residual, so that its spectral efficiency is close to the full digital optimal precoding; 2) it provids at least 15\% energy efficiency improvement comparing with related algorithms.

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