dietcha
2012-05-28, 11:59 PM
The aim of this work is to compare several algorithms in a receiver for uplink
LTE (Long Term Evolution). In this receiver, the radio propagation channel is
estimated using pilot SC-FDMA symbols. For a continuous transmission on a
constant frequency interval, these channel estimates can be interpolated over
time. The interpolation is done over several pilot symbols thus making it
possible to use previous pilot sequenc es transmitted from one terminal in
estimating the new data from the same terminal. This paper only investigates
algorithms used for estimating the channel for data sequences. The
investigated algorithms are different regression and interpolation methods,
and also an MMSE (Minimum Mean Square Error) method. Here the
performance between frequency hopping and an interpolation algorithm is
compared. With frequency hopping this interpolation is not possible. Instead a
frequency diversity gain is expected when the transmitter regularly changes
frequency interval. The LTE environment is simulated with a simulator written
in Matlab.
This is a report for a master thesis done at E******* Lindholmen.
http://www.ee.kth.se/php/modules/publications/reports/2007/IR-SB-.pdf
LTE (Long Term Evolution). In this receiver, the radio propagation channel is
estimated using pilot SC-FDMA symbols. For a continuous transmission on a
constant frequency interval, these channel estimates can be interpolated over
time. The interpolation is done over several pilot symbols thus making it
possible to use previous pilot sequenc es transmitted from one terminal in
estimating the new data from the same terminal. This paper only investigates
algorithms used for estimating the channel for data sequences. The
investigated algorithms are different regression and interpolation methods,
and also an MMSE (Minimum Mean Square Error) method. Here the
performance between frequency hopping and an interpolation algorithm is
compared. With frequency hopping this interpolation is not possible. Instead a
frequency diversity gain is expected when the transmitter regularly changes
frequency interval. The LTE environment is simulated with a simulator written
in Matlab.
This is a report for a master thesis done at E******* Lindholmen.
http://www.ee.kth.se/php/modules/publications/reports/2007/IR-SB-.pdf