초록 ▼

The partially-parallel trellis decoder with equalizer (360) uses multiple channel estimators (377, 379) but less than one independent channel estimator for each state. The state information set from the state with the best state metric as computed during the previous time period is used to update a

The partially-parallel trellis decoder with equalizer (360) uses multiple channel estimators (377, 379) but less than one independent channel estimator for each state. The state information set from the state with the best state metric as computed during the previous time period is used to update a primary channel estimator (377), and a state information set from the state with the second best state metric as computed during the previous time period is used to update a secondary channel estimator (379). Each updated channel estimator (377, 379) processes the corresponding state information set to calculate the possible transmitted symbols and their associated state metrics. Because there are fewer channel estimators than states, any unassigned states are processed using the primary channel estimator (377) but do not update the primary channel estimator (377).

대표청구항 ▼

1. A partially-parallel trellis decoder for decoding a received digital signal comprising:an s-state trellis decoder, where s is an integer greater than or equal to 3, for receiving the received digital signal and computing state information sets and state metrics for state transitions from a time t

1. A partially-parallel trellis decoder for decoding a received digital signal comprising:an s-state trellis decoder, where s is an integer greater than or equal to 3, for receiving the received digital signal and computing state information sets and state metrics for state transitions from a time t=(n-1)T to a time t=nT; a primary adaptive channel estimator, coupled to the s-state trellis decoder, for updating a primary channel estimate using a first state information set and the received digital signal and for processing the first state information set according to the primary channel estimate; and a secondary adaptive channel estimator, coupled to the s-state trellis decoder, for updating a secondary channel estimate using a second state information set and the received digital signal and for processing the second state information set according to the secondary channel estimate, wherein a remaining state information set is processed by the primary adaptive channel estimator according to the primary channel estimate.