Abstract: In at least some embodiments, a communication system includes a receiver having a local oscillator (LO) for each of a plurality of frequency bands. Each LO is controlled by a separate phase-locked loop (PLL) that tracks carrier frequency offset (CFO) using a common phase error (CPE). The CPE is selectively weighted based on at least one inter-band frequency correlation (IFC) coefficient.

Abstract: In at least some embodiments, a communication system includes a receiver having a local oscillator (LO) for each of a plurality of frequency bands. Each LO is controlled by a separate phase-locked loop (PLL) that tracks carrier frequency offset (CFO) using a common phase error (CPE). The CPE is selectively weighted based on at least one inter-band frequency correlation (IFC) coefficient.

Abstract: A system and method for determining an optimal antenna position of a directional antenna in a wireless communication system are described. The optimal antenna position is determined by calculating a steering metric value for possible antenna positions and the antenna position with the highest steering metric value is selected as the optimal antenna position.

Abstract: A test system is disclosed in which the packet error rate of a wireless card can be determined without having knowledge of the software interface to the card. The wireless card under test is placed inside an anechoic chamber. Test equipment emulates an access point and the card under test “associates” itself with the emulated access point. The test equipment includes an arbitrary waveform generator, RF signal generator, and a controller which emulates an access point. The controller commands the arbitrary waveform generator and RF signal generator to transmit a test data packet to the card under test. If the test data packet is correctly received by the test card, the card transmits back an acknowledgment packet. The controller computes the packet error rate based on the number of lost packets relative to the total number of test data packets sent.

Abstract: An original signal, different portions of which are captured by two or more different receivers, is reconstructed from the outputs of the various receivers. In a first embodiment, signal reconstruction is achieved by first converting the analog receiver outputs into digital signals and then shifting the frequency of at least one of the digital signals such that a frequency difference is introduced between at least two of the digital signals. Thereafter, each digital signal is processed through a corresponding filter (38, 40) to derive filtered signals. These filtered signals are combined to derive a primary output signal which is a representation of the original signal. After the primary output signal is derived, it is passed on to an error determiner (44) where an error component is computed. This error component is used to adjust the parameters of the filters (38, 40) in such a manner as to reduce the error component.