Abstract: The technology disclosed concerns a method, system, and computer media for self-calibrating a test environment to replicate path loss between wireless devices in a model environment despite Over the Air coupling uncertainty. The test environment has a controller and test chambers holding wireless devices and connected by connective cables fitted with attenuators and measurement devices. For a pair of test chambers, the controller causes generation of first and second reference signals to be transmitted over a respective cable, to and from the held wireless devices. The controller receives, from the respective measurement device on the respective connective cable, measurements of the first and second reference signals. The controller sends configuration signals to the respective attenuator based on the measurements of the first and second reference signals, causing the respective attenuator to reproduce path loss in the model environment between the pair of signal sources.

Abstract: The technology involves a method, medium, and testbed scoring cloud-application Quality of Experience (“QoE”) by emulating a mesh network at building locations inside of a building. The testbed includes test environment devices comprising test chambers holding respective stations (“STAs”) that run applications, or Access Points (“APs”) coupled in a mesh, respective connective cables between pairs of test environment devices, the cables reproducing attenuation between building locations, and at least one of the APs serving as a gateway to an internet server. QoE scoring includes a controller causing multiple types of applications on the STAs to generate traffic by executing test exchanges with the server. The testbed measures traffic produced by the test exchanges and scores the traffic streams measured for each of the test sequences of exchanges by combining the measurements into traffic stream scores and by combining the traffic stream scores for the application into a cloud-application QoE score.

Abstract: Forward error correction is used in conjunction with detection of a start frame delimiter (SFD) to provide flexibility and to reduce missed instances of an SFD. Candidate SFDs in an incoming signal are identified using a lower-than-normal detection threshold, and corresponding markers are stored in a buffer. For each stored marker, a physical layer header following the candidate SFD is decoded with error-correction techniques, to determine whether uncorrectable errors exist. If so, the candidate is discarded and the next candidate is evaluated. If no uncorrectable errors exist, the candidate is declared a valid SFD, and the remaining signal is decoded. Dual detection thresholds can be employed in networks that permit both error-encoded and non-coded packets. A technique for selecting SFD patterns that facilitate higher performance is also disclosed.

Abstract: Systems and methods for multimode signal acquisition. The systems include a multimode receiver that is configured to determine a communication mode for a received signal. The receiver includes, for example, one or more analysis modules for analyzing a characteristic of a portion of the received signal (e.g., a preamble). The receiver samples the received signals and one or more analysis modules perform frequency analysis on the digital form of the received signal (e.g., using a Goertzel algorithm). The outputs of the analysis modules are then provided to a classification module. The classification module compares, for example, a power spectral density (“PSD”) value for one or more frequencies of interest specific to the different communication modes to predetermined PSD values at those frequencies to determine the communication mode. The receiver is then configured for the full acquisition of signals transmitted using the determined communication mode.

Abstract: A method of receiving a bitstream. The method includes receiving a sequence of bits of a bitstream, assigning a confidence level to each bit in the sequence of bits, maintaining a running confidence level of the sequence of bits as the bits are received, comparing the running confidence level to a threshold, terminating reception of the bitstream when the running confidence level is below the threshold, and requesting retransmission of the bitstream. Wherein the reception of the bitstream and the requesting of retransmission of the bitstream occurs prior to the entire bitstream being received.

Abstract: Forward error correction is used in conjunction with detection of a start frame delimiter (SFD) to provide flexibility and to reduce missed instances of an SFD. Candidate SFDs in an incoming signal are identified using a lower-than-normal detection threshold, and corresponding markers are stored in a buffer. For each stored marker, a physical layer header following the candidate SFD is decoded with error-correction techniques, to determine whether uncorrectable errors exist. If so, the candidate is discarded and the next candidate is evaluated. If no uncorrectable errors exist, the candidate is declared a valid SFD, and the remaining signal is decoded. Dual detection thresholds can be employed in networks that permit both error-encoded and non-coded packets. A technique for selecting SFD patterns that facilitate higher performance is also disclosed.