Hybrid receiver with algorithmic combining and method
AssigneeNokia Siemens Networks Oy
InventorsKhairul Hasan, Eric Jones, Bruce Lee, Mikko Saily, Sathiaseelan Sundaralingam
Life of this patent
Estimating the term…
Abstract
A hybrid receiver apparatus, a method, and a computer readable storage media encoded with a program are provided. The hybrid receiver apparatus a first receiver processor and a second receiver processor and a signal input by the hybrid receiver apparatus is processed by both the first receiver processor and the second receiver processor. The hybrid receiver apparatus includes a combiner unit combining data output from the first receiver processor with data output from the second receiver processor based on a weight values assigned to the data.
Claims7
A hybrid receiver apparatus, comprising:
- a first equalizer processor as a first receiver processor;
- a second equalizer processor as a second receiver processor,
- a scaling and normalization unit inputting a received signal;
- a Least Square Estimates (LSE) unit receiving a sample from the scaling and normalization unit;
- a noise whitening unit receiving a sample and a tap from the LSE unit;
- and
- a tap smoothing and prefiltering unit receiving a sample from the noise whitening unit, a feedforward tap from the first receiver processor, and a feedforward tap from the second receiver processor,
- wherein one of the first equalizer processor and the second equalizer processor is a time domain equalizer processor and a signal input by the hybrid receiver apparatus is processed by both the first receiver processor and the second receiver processor.
A hybrid receiver apparatus, comprising:
- a frequency domain-linear equalizer (FD-LE) processor;
- a frequency domain-decision feedback equalizer (FD-DFE) processor;
- a combiner unit combining first data output from the frequency domain-linear equalizer processor with second data output from the frequency domain-decision feedback equalizer processor based on a first weight value assigned the first data and a second weight value assigned the second data;
- and
- an equalizer inputting a tap and a sample from the combiner unit.
A non-transitory computer readable storage medium encoded with a program that when executed by the computer enables the computer to improve communication performance by executing a method comprising:
- processing an inputted signal with a Frequency Domain Linear Equalizer (FD-LE) processing algorithm and with a Frequency Domain-Decision Feedback Equalizer (FD-DFE) processing algorithm;
- assigning a weight value to a result of each of two different receiver processing algorithms;
- combining data output from the FD-LE processing algorithm that is assigned a first weight value with data output from the FD-DFE processing algorithm that is assigned a second weight value;
- and
- outputting data based on the assigning of the weight value.
A method of improving communication performance comprising:
- deriving samples from two or more different receiver signal processing paths using at least two different receiver processing algorithms, one of which is a time domain equalizer processing algorithm, to produce derived samples;
- scaling and normalizing the derived samples to produce normalized samples;
- calculating a least square estimate of each of the normalized samples to produce estimated samples;
- noise whitening of the estimated samples to produce noise whitened samples;
- smoothing and prefiltering the noise whitened samples and the derived samples to produce smoothed samples;
- and
- combining the derived-smoothed samples.
Dependencies are inferred from the claim text.