Wavenetix's Joint Detection Algorithm

Modern wideband data 3G and 4G air protocols, such as HSPA, TD-SCDMA, WiMAX, and LTE, have short pilot patterns, which makes signal detection and measurement difficult when interference is present. Joint detection of signals and interference dramatically expands the dynamic range of detection:

  • In synchronous networks, such as WiMAX or TD-LTE, pilot symbols from different sectors coincide or overlap in time (preambles or RSs), which makes their joint detection practical and desirable.
  • The present algorithm uses several iterations of increasingly more accurate estimation of preamble power for each of the jointly detected signals in the presence of diminished power from interfering signals, which drives digital cross-correlation noise down.In the end, a cleaner version of the channel impulse response for a given cell is produced.

EXAMPLE: JD algorithm applied to three sectors (Clearwire WiMAX network):