Centre of Excellence in Wireless Technology

Prasanth Karunakaran

Kiran Kumar Kuchi

Bhaskar Ramamurthi

Jeniston Deviraj Klutto Milleth

Krishnamurthi Giridhar

Padmanabhan Madampu Suryasarman

Vinod Ramaswamy

Baskaran Dhivagar

Dileep Manisseri Kalathil

Geordie George

Yerrapareddy Sivakishore Reddy

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.

Pilot aided data transmission and reception with interference mitigation in wireless systems

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 can estimate tile channel state information without any interference from the remaining transmitters and at the same time the receiver can measure either the individual interference channel states or the interference covariances from the silent periods. 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.

Growing community of inventors

Chennai, India

Prasanth Karunakaran