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DTSTAMP:20200925T051447Z
UID:DABCA9F7-C5C2-4EED-9ABE-9E788650AFF6
DTSTART;TZID=Australia/Sydney:20200925T140000
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DESCRIPTION:Abstract: In the public channels\, it is desirable to transmit 
 the common signals omnidirectionally to ensure cell-wide coverage. In this
  talk\, we first develop low-cost closed-form omnidirectional precoding de
 signs for a massive multiple-input multiple-output (MIMO) system equipped 
 with a uniform rectangular array (URA). In particular\, we derive an optim
 al solution based on the complementary set (CS) or the complete complement
 ary codes (CCC). We prove that the precoding vectors based on the CS or CC
 C sequences can generate a perfectly flat radiation-power pattern. Since b
 oth CS and CCC sequences are binary and constant-modulus\, the proposed sc
 hemes are well suited to be implemented in the radio frequency (RF) analog
  domain with low hardware cost and suppressed peak-to-average power ratio 
 (PAPR). The design of the proposed closed-form schemes relies on the exist
 ence of the corresponding CS or CCC for a given URA configuration. To over
 come the limitations\, we further develop an iterative rank-reduction algo
 rithm. It is shown that the proposed algorithm can always obtain three pre
 coding vectors to generate a perfectly flat radiation-power pattern for an
 y URA configuration. By further imposing the constant-modulus constraints 
 for every entries of the precoding matrix\, we propose a Newton’s method
 \, which can always obtain a rank-4 omnidirectional precoding matrix for a
  general URA. The proposed numerical optimzation based schemes complement 
 well the CS- and CCC-based schemes. Overall\, this work provides a unified
  approach to omnidirectional precoding for massive MIMO equipped with URA.
 \n\nSpeaker(s): Prof. Xin Wang\, \n\nVirtual: https://events.vtools.ieee.o
 rg/m/237680
LOCATION:Virtual: https://events.vtools.ieee.org/m/237680
ORGANIZER:ying.he@uts.edu.au
SEQUENCE:2
SUMMARY:IEEE VTS NSW CHAPTER DISTINGUISHED LECTURE: Omnidirectional Precodi
 ng for Massive MIMO with Uniform Rectangular Array
URL;VALUE=URI:https://events.vtools.ieee.org/m/237680
X-ALT-DESC:Description: <br /><p>Abstract: In the public channels\, it is d
 esirable to transmit the common signals omnidirectionally to ensure cell-w
 ide coverage. In this talk\, we first develop low-cost closed-form omnidir
 ectional precoding designs for a massive multiple-input multiple-output (M
 IMO) system equipped with a uniform rectangular array (URA). In particular
 \, we derive an optimal solution based on the complementary set (CS) or th
 e complete complementary codes (CCC). We prove that the precoding vectors 
 based on the CS or CCC sequences can generate a perfectly flat radiation-p
 ower pattern. Since both CS and CCC sequences are binary and constant-modu
 lus\, the proposed schemes are well suited to be implemented in the radio 
 frequency (RF) analog domain with low hardware cost and suppressed peak-to
 -average power ratio (PAPR). The design of the proposed closed-form scheme
 s relies on the existence of the corresponding CS or CCC for a given URA c
 onfiguration. To overcome the limitations\, we further develop an iterativ
 e rank-reduction algorithm. It is shown that the proposed algorithm can al
 ways obtain three precoding vectors to generate a perfectly flat radiation
 -power pattern for any URA configuration. By further imposing the constant
 -modulus constraints for every entries of the precoding matrix\, we propos
 e a Newton&rsquo\;s method\, which can always obtain a rank-4 omnidirectio
 nal precoding matrix for a general URA. The proposed numerical optimzation
  based schemes complement well the CS- and CCC-based schemes. Overall\, th
 is work provides a unified approach to omnidirectional precoding for massi
 ve MIMO equipped with URA.</p>
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