| US 7,555,293 B2 | ||
| System for determining RF path loss between an RF source and an RF receiver and related methods | ||
| Yihong Qi, St. Agatha (Canada); Perry Jarmuszewski, Waterloo (Canada); and Michael Certain, Kitchener (Canada) | ||
| Assigned to Research In Motion Limited, Waterloo, Ontario (Canada) | ||
| Filed on Mar. 01, 2006, as Appl. No. 11/364,999. | ||
| Prior Publication US 2007/0207799 A1, Sep. 06, 2007 | ||
| Int. Cl. H04Q 7/20 (2006.01) | ||
| U.S. Cl. 455—423 [455/525] | 21 Claims |
| 1. A test method for determining radio frequency (RF) path loss for a plurality of RF channels in a given RF frequency band,
the test method comprising:
providing an RF source for transmitting RF power values at a relatively fine granularity;
providing an RF receiver for generating received signal strength indicator values (RSSI) at a relatively coarse granularity;
determining RF path losses for selected RF channels based upon generated RSSI values of the RF receiver within the given RF
frequency band by sweeping relatively coarse and relatively fine RF power values transmitted from the RF source;
determining an RF path loss function based upon the RF path losses of the selected RF channels; and
determining an RF path loss having the relatively fine granularity with a finer granularity than the relatively coarse granularity
of the generated RSSI for at least one other channel within the given RF frequency band based upon the RF path loss function.
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