Edge MMSE filters
AssigneeMaxLinear, Inc.
InventorsRamakrishna Akella, Roger Cheng
Life of this patent
Estimating the term…
Abstract
A method for performing channel estimation of an OFDM channel includes, in part, interpolating pilots for sub-channels positioned within a first range of an OFDM symbol, and estimating frequency response of sub-channels positioned within a second range of the OFDM symbol. The first range is defined by subchannels positioned substantially away from channel edges and the second range is defined by subchannels positioned substantially near channel edges. The method optionally includes transforming the pilots from frequency domain into the time-domain, time-domain windowing to obtain a channel impulse response having a multitude of discrete values, estimating the discrete values within the channel impulse response; and transforming the channel impulse response to the frequency domain.
Claims18
A channel estimator disposed in an Orthogonal Frequency Division Multiplexing (OFDM) receiver, the channel estimator comprising:
- an interpolator adapted to interpolate pilots for sub-channels positioned within a first range of an OFDM symbol;
- and
- a filter adapted to estimate frequency response of sub-channels positioned within a second range of the OFDM symbol, said first range defined by subchannels positioned substantially away from channel edges and said second range defined by subchannels falling substantially near channel edges.
A method for performing channel estimation of an Orthogonal Frequency Division Multiplexing (OFDM) channel, the method comprising:
- interpolating pilots for sub-channels positioned within a first range of an OFDM symbol;
- and
- estimating frequency response of sub-channels positioned within a second range of the OFDM symbol using a filter, said first range defined by subchannels positioned substantially away from channel edges and said second range defined by subchannels positioned substantially near channel edges.
Dependencies are inferred from the claim text.