Methods and apparatus for providing a demapping system with phase compensation to demap uplink transmissions
AssigneeMarvell Asia Pte Ltd
InventorsSabih Guzelgoz, Hong Jik Kim
Life of this patent
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Abstract
Methods and apparatus for providing a demapping system with phase compensation to demap uplink transmissions. In an embodiment, a method is provided that includes detecting a processing type associated with a received uplink transmission, and when the detected processing type is a first processing type then performing the following operations: removing resource elements containing reference signals from the uplink transmission; layer demapping remaining resource elements of the uplink transmission into two or more layers; phase compensating all layers to generate phase compensated layers; and soft-demapping all phase compensated layers to produce phase compensated soft-demapped bits.
Claims40
A method for providing phase compensation to reduce phase noise, the method comprising:
- identifying reference symbols from received symbols via a wireless communication network;
- obtaining generated reference symbols by a component of a demapping system;
- calculating a phase compensation coefficient in accordance with the reference symbols and the generated reference symbols;
- and
- generating real (Re) bit values and imaginary (Im) bit values by multiplying an input with the phase compensation coefficient.
A method for providing phase compensation to reduce phase noise, the method comprising:
- generating real (Re) bit values by multiplying an input with a phase compensation coefficient;
- multiplying a modulation (MOD) scale signal with a scaled signal to interference noise ratio (SINR) signal to generate a first result;
- shifting and rounding the first result by a first predefined value to generate a second result;
- multiplying the second result with an Re output to generate a third result;
- and
- generating a phase compensated soft demapped Log-likelihood ratio (LLR) signal in response to shifting and rounding of the third result.
An apparatus for providing phase compensation to reduce phase noise, the apparatus comprising:
- a phase coefficient calculator configured to calculate a phase compensation coefficient in accordance with reference symbols and generated reference symbols;
- a multiplier coupled to the phase coefficient calculator and configured to generate a real (Re) bit value by multiplying the phase compensation coefficient with an input;
- a first shift and rounding circuit coupled to the multiplier and configured to generate a shifted and rounded Re bit value;
- and
- a saturation circuit coupled to the first shift and rounding circuit and operable to generate a Re output in response to the shifted and rounded Re bit value.
An apparatus for providing phase compensation to reduce phase noise, the apparatus comprising:
- means for identifying reference symbols from received symbols via a wireless communication network;
- means for obtaining generated reference symbols by a component of a demapping system;
- means for calculating a phase compensation coefficient in accordance with the reference symbols and the generated reference symbols;
- and
- means for generating real (Re) bit values and imaginary (Im) bit values by multiplying an input with the phase compensation coefficient.
Dependencies are inferred from the claim text.