Abstract: A method for Bluetooth packet acquisition is described. The method includes performing preamble detection on a received signal using a first set of cross-correlation results. The method also includes delaying packet detection by a delay window when a preamble is detected. The method further includes detecting the Bluetooth packet based on a maximum cross-correlation result of the received signal within a packet search window of a second set of cross-correlation results.

Abstract: A modem architecture and a method of reducing on-chip memory requirements in a downloadable modem architecture are provided. The preferred architecture consists of a Digital Signal Processor (DSP) (6) with on-chip Random Access Memory (RAM) (12). A procedure which exploits inactivity intervals in a modem modulation function is provided. The procedure dynamically downloads the requisite code segments for each phase of the function from a cheaper, slower external memory (14) into the DSP on-chip RAM during inactivity intervals, thereby reducing the DSP on-chip RAM requirements.

Abstract: A method and apparatus for efficient implementation of a frame-based trellis spectral shaping with a variable look-ahead depth that reduces memory and computational requirements that includes a data encoder for generating spectrally-shaped coded data according to a trellis coding system, a metric computation and trellis engine, and a processing circuit to apply a selected coding strategy to data frames to generate spectrally-shaped coded data form transmission.