Register to reply

WOODBURY identity - Iterative LMMSE channel estimation for LTE

Share this thread:
florenti
#1
Apr7-12, 10:36 AM
P: 9
Hi,

I have the following problem regarding the iterative channel estimation employing LMMSE.

The channel estimation formula is:

H_lmmse,nt,nr,ns=Rhh*Xnt,ns'(sum(Xnt,ns*Rhh*Xnt,ns ')+sigma^2)^-1*Ynr,ns.

Explonation:

Rhh - channel autocorrelation matrix of size KxK (K number of subcarriers)

Xnt,ns - diagonal matrix size Kx, kontaining in its diagonal: pilot symbols, data symbols and zero symbols. nt-Tx antenna index. ns - OFDM symbol index.

sigma-noise variance

sum - goes from 1 to Ntx(for the number of Tx antennas)

Ynr,ns - Rx signal. nr - Rx antenna index.

Is there any posibility to apply the WOODBURY identity to the H_lmmse,nt,nr,ns, and how can this be done?

Thanks in advance
Phys.Org News Partner Science news on Phys.org
Apple to unveil 'iWatch' on September 9
NASA deep-space rocket, SLS, to launch in 2018
Study examines 13,000-year-old nanodiamonds from multiple locations across three continents

Register to reply

Related Discussions
Iterative LMMSE channel estimation for LTE/MIMO-OFDM Engineering Systems & Design 0
Spectrum estimation with noisy data, unbiased estimation of amplitudes needed Electrical Engineering 6
Channel estimation i communication Electrical Engineering 0
How to add additional channel for analog TV (Local Community Channel) General Engineering 1
UFO Hunters on The SciFi Channel and The History Channel Science Fiction & Fantasy 18