Method and system of receiver parametric computation for multiple-input multiple-output (mimo) transmission

A method of calculating combining weight vectors associated with a received composite information signal comprising at least one data stream transmitted from at least a first antenna, a second antenna, a third antenna, and a fourth antenna, the calculated combining weight vectors being used to demodulate the at least one data stream transmitted through a transmission channel, the method comprising:

• computing a parametric estimate of an impairment covariance matrix including at least a first impairment term associated with common pilots deployed by the first antenna, the second antenna, the third antenna, and the fourth antenna respectively, wherein the common pilots are pilots without being precoded or beam-formed, wherein the first impairment term captures effects of interferences of the common pilots, and wherein the computed impairment covariance matrix further includes a data covariance term capturing effects of the at least one data stream and an interference term caused at least partially by contribution of thermal noise of receiver branches;
• computing the impairment covariance matrix including a second impairment term associated with at least one dedicated pilot, wherein the dedicated pilot is a pilot being precoded or beam-formed, and wherein the second impairment term captures effects of interferences caused by the at least one dedicated pilot;
• and
• computing a combining weight vector using the computed impairment covariance matrix.

A method of calculating combining weight vectors associated with a received composite information signal comprising at least one data stream transmitted from at least a first antenna, a second antenna, a third antenna, and a fourth antenna, a calculated combining weight vector being used to demodulate the at least one data stream transmitted through a transmission channel, the method comprising:

• computing a parametric estimate of an impairment covariance matrix including at least a first impairment term associated with common pilots deployed by the first antenna, the second antenna, the third antenna, and the fourth antenna respectively, wherein the common pilots are pilots without being precoded or beam-formed, wherein the first impairment term captures effects of interferences of the common pilots, and wherein the computed impairment covariance matrix further includes a data covariance term capturing effects of the at least one data stream and an interference term caused at least partially by contribution of thermal noise of receiver branches;
• computing the impairment covariance matrix including a second impairment term associated with at least a first scheduled common pilot and a second scheduled common pilot associated with the third antenna and the fourth antenna respectively, wherein the additional scheduled common pilots being deployed only when the at least one data stream is scheduled to be transmitted to a user equipment (UE) supporting demodulation of signals on at least the additional third and fourth antenna, and wherein the second impairment term captures effects of interferences caused by the additional scheduled common pilots;
• and
• computing a combining weight vector using the computed impairment covariance matrix.

A network device configured to perform as a wireless communication receiver in a network, comprising:

• a radio front-end circuit configured to receive a composite information signal, the composite information signal comprising at least one data stream transmitted from at least a first antenna and a second antenna;
• a covariance estimation module configured to compute a parametric estimate of an impairment covariance matrix including at least a first impairment term associated with common pilots deployed by the first antenna and the second antenna respectively, wherein the common pilots are pilots without being precoded or beam-formed, wherein the first impairment term capture effects of interferences between the common pilots, in addition to effects of interferences caused by each common pilot singly, and wherein the computed impairment covariance matrix further includes a data covariance term capturing effects of the at least one data stream and an interference term caused at least partially by contribution of thermal noise of receiver branches;
• and
• a combining weight vector computation module configured to compute a combining weight vector using the computed impairment covariance matrix.

A network device configured to perform as a wireless communication receiver in a network, comprising:

• a radio front-end circuit configured to receive a composite information signal, the composite information signal comprising at least one data stream transmitted from at least a first antenna, a second antenna, a third antenna, and a fourth antenna;
• a covariance estimation module configured to compute a parametric estimate of an impairment covariance matrix including at least a first impairment term associated with common pilots deployed by the first antenna, the second antenna, the third antenna, and the fourth antenna respectively, wherein the common pilots are pilots without being precoded or beam-formed, wherein the first impairment term captures effects of interferences of the common pilots, wherein the computed impairment covariance matrix further includes a second impairment term associated with at least one dedicated pilot, wherein the at least one dedicated pilot is a pilot being precoded or beam-formed, and wherein the second impairment term captures effects of interferences caused by the at least one dedicated pilot;
• and
• a combining weight vector computation module configured to compute a combining weight vector using the computed impairment covariance matrix.

A network device configured to perform as a wireless communication receiver in a network, comprising:

• a radio front-end circuit configured to receive a composite information signal, the composite information signal comprising at least one data stream transmitted from at least a first antenna, a second antenna, a third antenna, and a fourth antenna;
• a covariance estimation module configured to compute a parametric estimate of an impairment covariance matrix including at least a first impairment term associated with common pilots deployed by the first antenna, the second antenna, the third antenna, and the fourth antenna respectively, wherein the common pilots are pilots without being precoded or beam-formed, wherein the first impairment term captures effects of interferences of the common pilots, wherein the computed impairment covariance matrix further includes a second impairment term associated with at least a first scheduled common pilot and a second scheduled common pilot associated with the third antenna and the fourth antenna respectively, wherein the additional scheduled common pilots being deployed only when the at least one data stream is scheduled to be transmitted to a user equipment (UE) supporting demodulation of signals on at least the additional third and fourth antenna, and wherein the second impairment term captures effects of interferences caused by the additional scheduled common pilots;
• and
• a combining weight vector computation module configured to compute a combining weight vector using the computed impairment covariance matrix.

A network device configured to perform as a wireless communication receiver in a network, comprising:

• a radio front-end circuit configured to receive a composite information signal, the composite information signal comprising at least one data stream transmitted from at least a first antenna, a second antenna, a third antenna, and a fourth antenna;
• a covariance estimation module configured to compute a parametric estimate of an impairment covariance matrix including at least a first impairment term associated with common pilots deployed by the first antenna, the second antenna, the third antenna, and the fourth antenna respectively, wherein the common pilots are pilots without being precoded or beam-formed, wherein the first impairment term capture effects of interferences of the common pilots, and wherein the computed impairment covariance matrix further includes a data covariance term capture effects of the at least one data stream and an interference term caused at least partially by contribution of thermal noise of receiver branches;
• and
• a combining weight vector computation module configured to compute a combining weight vector using the computed impairment covariance matrix, wherein computing the combining weight vector includes a matrix update no higher than rank-one.

A method of calculating combining weight vectors associated with a received composite information signal comprising at least one data stream transmitted from at least a first antenna, a second antenna, a third antenna, and a fourth antenna, a calculated combining weight vector being used to demodulate the at least one data stream transmitted through a transmission channel, the method comprising:

• compute a parametric estimate of an impairment covariance matrix including at least a first impairment term associated with common pilots deployed by the first antenna, the second antenna, the third antenna, and the fourth antenna respectively, wherein the common pilots are pilots without being precoded or beam-formed, wherein the first impairment term capture effects of interferences between the common pilots, in addition to effects of interferences caused by each common pilot singly, wherein the computed impairment covariance matrix further includes a data covariance term capturing effects of the at least one data stream and an interference term caused at least partially by contribution of thermal noise of receiver branches, and wherein the computed impairment covariance matrix further includes a second impairment term associated with one of
• at least one dedicated pilot, wherein the dedicated pilots are pilots being precoded or beam-formed, and wherein the second impairment term captures effects of interferences caused by the at least one dedicated pilots;
• and
• at least a first scheduled common pilot and a second scheduled common pilot associated with the third antenna and the fourth antenna respectively, wherein the additional scheduled common pilots being deployed only when the at least one data stream is scheduled to be transmitted to a user equipment (UE) supporting demodulation of signals on at least the additional third and fourth antenna, and wherein the second impairment term captures effects of interferences caused by the additional scheduled common pilots;
• and
• computing a combining weight vector using the computed impairment covariance matrix, wherein computing the combining weight vector includes a matrix update no higher than rank-one.

A wireless communication receiver, comprising:

• a radio front-end circuit configured to receive a composite information signal, the composite information signal comprising at least one data stream transmitted from at least a first antenna, a second antenna, a third antenna, and a fourth antenna;
• a covariance estimation module configured to compute a parametric estimate of an impairment covariance matrix including at least a first impairment term associated with common pilots deployed by the first antenna, the second antenna, the third antenna, and the fourth antenna respectively, wherein the common pilots are pilots without being precoded or beam-formed, wherein the first impairment term capture effects of interferences between the common pilots, in addition to effects of interferences caused by each common pilot singly, wherein the computed impairment covariance matrix further includes a data covariance term capture effects of the at least one data stream and an interference term caused at least partially by contribution of thermal noise of receiver branches and wherein the computed impairment covariance matrix further includes a second impairment term associated with one of
• at least one dedicated pilot, wherein the dedicated pilots are pilots being precoded or beam-formed, and wherein the second impairment term captures effects of interferences caused by the at least one dedicated pilots;
• and
• at least a first scheduled common pilot and a second scheduled common pilot associated with the third antenna and the fourth antenna respectively, wherein the additional scheduled common pilots being deployed only when the at least one data stream is scheduled to be transmitted to a user equipment (UE) supporting demodulation of signals on at least the additional third and fourth antenna, and wherein the second impairment term captures effects of interferences caused by the additional scheduled common pilots;
• and
• a combining weight vector computation module configured to compute a combining weight vector using the computed impairment covariance matrix, wherein computing the combining weight vector includes a matrix update no higher than rank-one.