Abstract:
An interference randomization method in a user equipment, UE, and a corresponding UE are disclosed. A set of control information bits comprising ACK/NACK bits are encoded to generate encoded control information bit. The encoded control information bits are scrambled to generate scrambled control information bits and the scrambled control information bits are modulated to generate modulated symbols. A physical uplink control channel, PUCCH, ACK/NACK resource index is determined and a first orthogonal sequence index, a second orthogonal sequence index, and a cyclic shift for a demodulation reference signal, DMRS, are determined wherein each of the first orthogonal sequence index, the second orthogonal sequence index, and the cyclic shift is determined based the PUCCH ACK/NACK resource index. The modulated symbols are speaded block-wise using a first orthogonal sequence indicated by the first orthogonal sequence index and a second orthogonal sequence indicated by the second orthogonal sequence index and the cyclic shift to the DMRS are applied. The DMRS and the block-wise spread modulated symbols are transmitted on a PUCCH.
Abstract:
An IS-OFDM system for point-to-point wireless communications that suppresses narrow-band interference comprises an IS-OFDM transmitter and an IS-OFDM receiver, wherein a transmitted signal comprises a plurality of subcarriers, and further wherein each subcarrier contains more than one and potentially all symbols transmitted in a given frame. The IS-OFDM transmitted signal is at a data rate that is equal to the data rate of the input data stream via the use of P/S converters.
Abstract:
Certain aspects of a method and system for achieving space and time diversity gain are disclosed. Aspects of one method may include modifying a generalization code of at least one pilot channel, to measure signal strengths for each of a plurality of received multipath signals. A portion of the plurality of received multipath signals may be combined based on the measured signal strengths. The signal strengths of the plurality of received multipath signals may be measured on a primary pilot channel by assigning its generalization code to zero. The signal strengths of the plurality of received multipath signals on a secondary pilot channel may measured by assigning its generalization code to a non-zero value.
Abstract:
Certain aspects of a method and system for achieving space and time diversity gain are disclosed. Aspects of one method may include modifying a generalization code of at least one pilot channel, to measure signal strengths for each of a plurality of received multipath signals. A portion of the plurality of received multipath signals may be combined based on the measured signal strengths. The signal strengths of the plurality of received multipath signals may be measured on a primary pilot channel by assigning its generalization code to zero. The signal strengths of the plurality of received multipath signals on a secondary pilot channel may measured by assigning its generalization code to a non-zero value.
Abstract:
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may use a lower code rate by splitting a data stream into multiple data sub-streams. The UE may split the data stream to synchronously encode, modulate, and spread the data sub-streams at different layers. Then, the UE may superpose or combine the sub-streams together. The UE may scramble the combined data stream with a UE-specific scrambling code. In some examples, the UE may then apply a cyclic prefix to the combined data stream. The UE may then transmit the combined data stream to a base station. The receiving base station may use layer-wise matched filters and element-wise signal estimators (ESE) to obtain soft information such as log-likelihood ratios. Channel decoders may then determine estimated bits for each layer of each user of the combined data stream.