Reference signal channel estimation
AssigneeGlobalstar L.P.
InventorsPeter John Black, Jinghu Chen, Jing Jiang, Tamer Adel Kadous, Wanlun Zhao
Life of this patent
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Abstract
Aspects of this disclosure relate to reference signal channel estimation. A wireless communication channel between two nodes can be estimated based on a received reference signal, such as a Sounding Reference Signal. Techniques are disclosed to improve performance of reference signal channel estimation and make channel estimates more robust in the presence of one or more of a variety of impairments. Frequency domain processing and/or time domain processing can be performed to reduce distortion in channel estimates.
Claims20
A system for Sounding Reference Signal channel estimation, the system comprising:
- at least one antenna;
- a frequency domain processing circuit configured to generate a de-covered frequency domain signal from a Sounding Reference Signal received by the at least one antenna using a base sequence, and to perform pulse shaping on the de-covered frequency domain signal to cause a direct current offset in the de-covered frequency domain signal to be reduced;
- a time domain processing circuit having an input coupled to an output of the frequency domain processing circuit, the time domain processing circuit configured to suppress time domain channel impulse response leakage;
- a second time domain processing circuit configured to rotate the Sounding Reference Signal on an indicator of a frequency offset, the second time domain processing circuit having an output coupled to an input of the frequency domain processing circuit;
- and
- a channel estimation circuit configured to generate a channel estimate based on an output of the time domain processing circuit, wherein the channel estimate is associated with a wireless communication channel between a user equipment and a network node.
A system for Sounding Reference Signal channel estimation, the system comprising:
- at least one antenna;
- a frequency domain processing circuit configured to generate a de-covered frequency domain signal from a Sounding Reference Signal received by the at least one antenna using a base sequence, and to perform pulse shaping on the de-covered frequency domain signal to cause a direct current offset in the de-covered frequency domain signal to be reduced;
- a time domain processing circuit having an input coupled to an output of the frequency domain processing circuit, the time domain processing circuit configured to suppress time domain channel impulse response leakage;
- a second time domain processing circuit configured to pulse shape the Sounding Reference Signal with a raised cosine pulse, the second time domain processing circuit having an output coupled to an input of the frequency domain processing circuit;
- and
- a channel estimation circuit configured to generate a channel estimate based on an output of the time domain processing circuit, wherein the channel estimate is associated with a wireless communication channel between a user equipment and a network node.
Dependencies are inferred from the claim text.