Abstract: An apparatus such as a Device Wire Adapter (DWA) with improved buffer management and packaging of Wireless Universal Serial Bus (WUSB) isochronous packets for transmission to a host. The apparatus includes an isochronous IN endpoint that receives data segments from a device function. Memory is associated with the endpoint and includes an endpoint buffer configured in a loop and a plurality of registers. The apparatus includes an endpoint controller that stores the received data segments sequentially in the loop buffer, assigns a set of the registers to each of the stored data segments, and stores additional packet information in the registers for each of the data segments rather than in the endpoint buffer. The additional packet information includes presentation time for the stored data segment derived from a sample time of a last segment in the buffer and a time interval between two consecutive data segments in the buffer.

Abstract: An active-set PAR reduction method has low computation cost and delay. Peak canceling, by adding up the original signal and the peak canceling signal, is done only after the final peak canceling signal that can reduce all peaks of the resultant signal below the desired peak level is generated with an iterative method or a maximum iteration is reached. The PAR reduction method cancels the high computation cost for accumulating the peak-canceling effort into each sample every iteration. In the i-th iteration, the method attempts to resolve an intermediate peak canceling signal that can reduce the i peaks of the resultant signal to the desired peak level. The method only calculates the samples of the intermediate peak canceling signal and performs balance testing in some locations where the peak level of the original signal is larger than a selected threshold.

Abstract: An apparatus such as a Device Wire Adapter (DWA) with improved buffer management and packaging of Wireless Universal Serial Bus (WUSB) isochronous packets for transmission to a host. The apparatus includes an isochronous IN endpoint that receives data segments from a device function. Memory is associated with the endpoint and includes an endpoint buffer configured in a loop and a plurality of registers. The apparatus includes an endpoint controller that stores the received data segments sequentially in the loop buffer, assigns a set of the registers to each of the stored data segments, and stores additional packet information in the registers for each of the data segments rather than in the endpoint buffer. The additional packet information includes presentation time for the stored data segment derived from a sample time of a last segment in the buffer and a time interval between two consecutive data segments in the buffer.