
{"publication_number": "US-8824267-B2", "abstract": "a transmission method and apparatus that combines the benefits of dft precoding and transmit diversity coding for pucch transmission . in one aspect , the invention provides an improved transmit diversity coding method and apparatus for dfts - ofdm pucch with minimal impact on multiplexing capacity . in one embodiment , the improved transmit diversity method and apparatus has the feature of employing frequency - domain separation for the payload signals .", "application_number": "US-201113016205-A", "description": "referring now to fig1 , fig1 illustrates a mobile terminal 102 having multiple antennas ( e . g ., antenna 111 and antenna 112 ) and communicating wirelessly with a network 110 . particular embodiments of mobile terminal 102 provide an improved transmit diversity coding process for dfts - ofdm pucch . referring now to fig2 , fig2 is a flow chart illustrating an example of such a process 200 that may be implemented by particular embodiments of mobile 102 . process 200 assumes that mobile terminal 102 includes only two antennas : antenna 111 and antenna 112 , but the described solution is not limited to two antennas as more than two antennas can be used . process 200 may begin in step 202 where a media - access control ( mac ) layer of mobile terminal 102 generates message bits ( e . g ., control information such as ack / nack bits , ack / nack bits plus a scheduling request bit , etc .). in step 204 , the message bits are encoded into a block of b bits ( e . g ., the message bits may be coded to form a block of 48 coded bits ). in step 206 , the block of coded bits is scrambled . in some embodiments , a block of coded bits may be scrambled using a cell - specific ( and possible dfts - ofdm symbol dependent ) sequence to produce a block of b ( e . g ., b = 48 ) scrambled bits { tilde over ( b )