Abstract: Generating a channel state informal ion (CSI) feedback report is provided. A set of reference signals is received (1302). A plurality of entries that are included in the CSI feedback report are computed (1304), where the entries of the CSI feedback report include at leas: a set of coefficients (1306). Each coefficient is associated with at least one or more of a spatial domain basis index, frequency domain basis index, and a layer index (1308). The plurality of entries of the CSI feedback report are arranged (1310) in an order known to both the user equipment and the network entity. The plurality of entries of the CSI feedback report are prioritized using predefined permutations of the indices (1314).

Abstract: Generating a channel state information (CSI) feedback report is provided. A set of reference signals is received (1502). A set of entries that are included in the CSI feedback report is computed (1504). Each entry has a most significant bit, and one or more remaining bits, where an order of each of the entries in the CSI feedback report are arranged based upon a bit level classification of the entries (1508). A value of the most significant bit of each of the entries is identified, and the entries, which have a most significant bit value corresponding to a higher bit value have the remaining bits arranged in a group that is positioned in the CSI feedback report prior to a group of tire remaining bits of the entries, which have a most significant bit value corresponding to a lower bit value (1510).

Abstract: Apparatuses, methods, and systems are disclosed for CSI report configuration. One method includes receiving at least one CSI reporting setting. The at least one CSI reporting setting includes at least one CSI RS resource setting, and the CSI reporting setting includes an indication of CSI feedback reporting for multiple transmission points in a mobile communication network. The method includes identifying a set of transmission hypotheses based on the CSI reporting setting. The hypotheses include a combination of single-point transmission from at least one TRP, or multi-point joint transmission from two TRPs. The method includes receiving at least one CSI reference signal resource transmitted from the mobile communication network based on the CSI reference signal resource setting. The method includes generating a set of at least one CSI report based on the CSI reporting setting.

Abstract: A method and apparatus is provided for generating a channel state information report. The method includes receiving reference signals transmitted from a base station. A set of beams are selected based on the received reference signals, each of the beams corresponding to a discrete Fourier transform vector, wherein each of the beams has a corresponding beam index. A set of quantized weighting coefficients are reported, each of the weighting coefficients corresponding to a respective beam index and a respective tap index. The tap index corresponds to a member of a Fourier basis set. At least two subsets of the reported set of weighting coefficients are quantized according to separate quantization procedures.

Abstract: A CBSR configuration can include a set of restricted beams. Each restricted beam can be constrained by a configured maximum allowed gain value. A set of beams including one or more restricted beams can be selected. A set of precoder coefficients can be determined for each selected beam. A function of the set of precoder coefficients can satisfy the configured maximum allowed gain value. The function can be proportional to a square root of an average of squared values of amplitudes of members of the subset. A CSI report can be transmitted. The CSI report can include at least an indicator of the set of selected beams and an indicator of the set of precoder coefficients corresponding to each selected beam.

Abstract: A CBSR configuration can include a set of restricted beams. Each restricted beam can be constrained by a maximum gain. A set of beams including one or more restricted beams can be selected based on received reference signals. A set of precoder coefficients, each forming a beam gain, can be determined for each selected beam. A function of the set of precoder coefficients can satisfy the maximum gain constraint. The function can be proportional to an average of amplitudes of members of a subset of the set of precoder coefficients or a square root of an average of squared values of amplitudes of members of the subset. A CSI report including at least an indicator of the set of selected beams, an indicator of the set of precoding coefficients, and coefficients of the selected beams can be transmitted.

Abstract: Apparatuses, methods, and systems are disclosed for generating a CSI report. One apparatus includes a transceiver that receives a set of reference signals transmitted from a base station and a processor that transforms the set of reference signals to obtain per-layer vectors of amplitude and phase coefficients of a DFT-compressed codebook. Here, each amplitude coefficient vector and phase coefficient vector corresponding to a tap in at least one identified beam. The processor calculates a subset of the taps for the at least one identified beam and controls the transceiver to transmit CSI feedback including the calculated taps to the base station, where each tap is an inverse Fourier transform of rows of time-domain coefficient vectors and where the CSI feedback includes an indication of one or more elements of the vectors of amplitude coefficient vectors and phase coefficient vectors corresponding to the at least one identified beam.

Abstract: A method and user equipment are provided for generating a channel state information feedback report, which has multiple layers, from channel state information associated with each of the multiple layers including at least one parameter, which is commonly present in the channel state information associated with each of the multiple layers. Each commonly present parameter in each of the multiple layers has a respective value. A set of reference signals transmitted from a network entity are received and observed channel characteristics are organized, based on the received set of reference signals, into the multiple layers of channel state information. From the at least one parameter, which is commonly present in each of the multiple layers, selecting one or more parameters from which a respective index value can be derived for each of the multiple layers.

Abstract: A method and apparatus are provided for generating a channel state information report. A set of reference signals transmitted from a base station are received, and a set of beams are identified based on the set of reference signals. The set of reference signals is transformed to obtain a set of vectors of amplitude and phase coefficients of a compressed codebook, each amplitude coefficient vector and phase coefficient vector corresponding to an identified beam in the set of beams. The amplitude coefficient vector for each identified beam in the set of beams is adjusted by a selected value, wherein the selected value is determined such that the amplitude coefficient vector corresponding to a particular beam is normalized to a known predetermined value. A predefined oversampling factor is set to a subset of the set of beams to a value greater than one, wherein the particular beam is excluded from the subset of beams.

Abstract: Apparatuses, methods, and systems are disclosed for generating a CSI report. One apparatus includes a transceiver that receives a set of reference signals transmitted from a base station and a processor that transforms the set of reference signals to obtain per-layer vectors of amplitude and phase coefficients of a DFT-compressed codebook. Here, the first element of the amplitude coefficient vector corresponding to one particular beam is unity and the first element of the phase coefficient vector corresponding to the particular beam is zero. The apparatus transmits CSI feedback that includes an indication of one or more elements of the vectors of amplitude coefficient vectors and phase coefficient vectors corresponding to at least one identified beam, and does not include the first element of the amplitude coefficient vector and the first element of the phase coefficient vector corresponding to the particular beam.

Abstract: For Type-II codebook compression, methods, apparatus, and systems are disclosed. One apparatus includes a transceiver that receives a reference signal and a processor that identifies a set of taps over a layer based on the reference signal, where the set of taps are selected from a set of Nsb indices, the value Nsb representing a number of sub-bands. The processor generates a combinatorial codeword representing the set of taps. The processor reports the combinatorial codeword for the set of taps as part of a CSI feedback report.

Abstract: For Type-II codebook compression, methods, apparatus, and systems are disclosed. One apparatus includes a transceiver that receives a reference signal and a processor that identifies a set of beams based on the reference signal. The processor generates a set of coefficients associated with each beam in the set of beams based on the reference signal and identifies a set of tap indices, where the set of tap indices is a common subset of coefficient indices that is the same over the set of beams. The processor generates a combinatorial codeword representing the set of tap indices and reports the combinatorial codeword for the set of tap indices as part of a CSI feedback report.

Abstract: A CBSR configuration can include a set of restricted beams. Each restricted beam of the set of restricted beams can be associated with a restricted beam gain coefficient. A plurality of sets of quantized coefficients can be determined based on the CBSR configuration. A set of quantized coefficients corresponding to a particular restricted beam can generate a set of quantized weights at a set of frequencies based on a least a Fourier transform of the set of quantized coefficients of the particular restricted beam. The plurality of sets of quantized coefficients can be determined such that quantized weights of the particular restricted beam satisfy a constraint based on at least the set of quantized coefficients corresponding to the particular restricted beam and the restricted beam gain coefficient. A CSI report can be transmitted. The CSI report can include the plurality of sets of quantized coefficients.

Abstract: A CBSR configuration can include a set of restricted beams. Each restricted beam can be constrained by a maximum gain. A set of beams including one or more restricted beams can be selected based on received reference signals. A set of precoder coefficients, each forming a beam gain, can be determined for each selected beam. A function of the set of precoder coefficients can satisfy the maximum gain constraint. The function can be proportional to an average of amplitudes of members of a subset of the set of precoder coefficients or a square root of an average of squared values of amplitudes of members of the subset. A CSI report including at least an indicator of the set of selected beams, an indicator of the set of precoding coefficients, and coefficients of the selected beams can be transmitted.

Abstract: A method and apparatus are provided for generating a channel state information report. A set of reference signals transmitted from a base station are received, and a set of beams are identified based on the set of reference signals. The set of reference signals is transformed to obtain a set of vectors of amplitude and phase coefficients of a compressed codebook, each amplitude coefficient vector and phase coefficient vector corresponding to an identified beam in the set of beams. The amplitude coefficient vector for each identified beam in the set of beams is adjusted by a selected value, wherein the selected value is determined such that the amplitude coefficient vector corresponding to a particular beam is normalized to a known predetermined value. A predefined oversampling factor is set to a subset of the set of beams to a value greater than one, wherein the particular beam is excluded from the subset of beams.

Abstract: A method and apparatus are provided for generating a channel state information report having information corresponding to a set of layers. The method includes receiving a set of reference signals transmitted from a network including at least one base station. A set of beams are identified based on the set of reference signals. A pair of amplitude and phase coefficient vectors are obtained by transforming the received set of reference signals, wherein each pair of the amplitude and phase coefficient vectors corresponds to a beam in the set of beams in each layer of the set of layers. The layers from the set of layers are partitioned into a set of layer-groups. A beam bitmap vector is generated for each layer-group indicating a subset of a selected set of beams within the layer-group. A coefficient bitmap vector is generated for each of the selected set of beams in each layer indicating the coefficients with non-zero amplitude values, based on the beam bit map vector.

Abstract: Apparatuses, methods, and systems are disclosed for generating a CSI report. One apparatus includes a transceiver that receives a set of reference signals transmitted from a base station and a processor that transforms the set of reference signals to obtain per-layer vectors of amplitude and phase coefficients of a DFT-compressed codebook. Here, the first element of the amplitude coefficient vector corresponding to one particular beam is unity and the first element of the phase coefficient vector corresponding to the particular beam is zero. The apparatus transmits CSI feedback that includes an indication of one or more elements of the vectors of amplitude coefficient vectors and phase coefficient vectors corresponding to at least one identified beam, and does not include the first element of the amplitude coefficient vector and the first element of the phase coefficient vector corresponding to the particular beam.

Abstract: For Type-II codebook compression, methods, apparatus, and systems are disclosed. One apparatus includes a transceiver that receives a reference signal and a processor that identifies a set of beams based on the reference signal. The processor generates a set of coefficients associated with each beam in the set of beams based on the reference signal and identifies a set of tap indices, where the set of tap indices is a common subset of coefficient indices that is the same over the set of beams. The processor generates a combinatorial codeword representing the set of tap indices and reports the combinatorial codeword for the set of tap indices as part of a CSI feedback report.

Abstract: A method and apparatus is provided for generating a channel state information report. The method includes receiving reference signals transmitted from a base station. A set of beams are selected based on the received reference signals, each of the beams corresponding to a discrete Fourier transform vector, wherein each of the beams has a corresponding beam index. A set of quantized weighting coefficients are reported, each of the weighting coefficients corresponding to a respective beam index and a respective tap index. The tap index corresponds to a member of a Fourier basis set. At least two subsets of the reported set of weighting coefficients are quantized according to separate quantization procedures.