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AssigneeCentre of Excellence in Wireless Technology
InventorsKiran Kumar Kuchi, Jeniston Deviraj Klutto Milleth, Vinod Ramaswamy, Baskaran Dhivagar, Dileep Manisseri Kalathil, Krishnamurthi Giridhar, Bhaskar Ramamurthi, Padmanabhan Madampu Suryasarman, Geordie George, Prasanth Karunakaran, Yerrapareddy Sivakishore Reddy
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Embodiments disclosed herein reduce interference at pilot symbols and also enable good interference measurements by using a combination pilot tones and null tones along with null tones. In this type of system, the receivers estimate the channel state information without any strong interference from the neighboring transmitters, and at the same time it can also measure either the individual interference channel states or the interference covariances from the silent periods. It uses these measurements thus obtained to calculate the post processing SINR, and then compute and report the wideband and subband CQIs to the transmitter. The groups of transmitters are reused in geographically separated region using a frequency reuse structure. In a preferred implementation, pilot signal is precoded using a multi-antenna precoder. The precoder may be same for pilot and data.
A method of implementing a receiver in a wireless communication network that transmits data using a plurality of antennas, said network using a unique pilot pattern corresponding to a sector number of a sector such that no two sectors with different sector numbers have pilots in same location in their respective pilot patterns, wherein said pilot pattern comprises of pilot tones and null tones, said method comprising:
A receiver in a wireless communication network that transmits data using a plurality of antennas, said receiver comprising at least one means for receiving and demodulating signal transmitted in said network where a unique pilot pattern is assigned corresponding to a sector identified by a sector number such that no two sectors with different sector numbers have pilots in same location in their respective pilot patterns, wherein said pilot pattern comprises of pilot tones and null tones, wherein an index of a type of said unique pilot pattern used by a transmitter is determined by at least one of network parameters and interference load conditions, and wherein said at least one of network parameters comprises a cell Identification (ID) corresponding to said transmitter.
A receiver in a wireless communication network that transmits data using a plurality of antennas, said network using a unique pilot pattern corresponding to a sector number of a sector such that no two sectors with different sector numbers have pilots in same location in their respective pilot patterns, wherein said pilot pattern comprises of pilot tones and null tones, said receiver comprising at least one means for:
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