123 results about "Decision error" patented technology

A system and method is provided overcoming decision-making and communications errors to produce expedited and accurate group choices. The invention provides collective outcomes that are resilient to communication and decision making errors, and which are provided with a minimum wait time. The system comprises a user interface engine that provides a channel to the features of the present invention, an agenda manager module for creating and presenting questions, a user manager module that controls interactions with user who request questionnaires, submit response data, and request access to analytical results, and a report manager module that identifies collective outcomes that are resilient to error and / or that weight individual votes to optimize the group's performance in producing one or more correct or optimal collective choices. A common data exchange allows communication between the modules.

Disclosed is a receiving device which comprises first and second AD converters for inputting a received analog signal and converting the analog signal to digital signals in response to sampling clock signals of mutually different phases, first and second adaptive equalizers for respectively receiving outputs of the first and second AD converters, third and fourth adaptive equalizers for respectively receiving outputs of the second and first AD converters, a first adder for adding the outputs of the first and second adaptive converters, a second adder for adding the outputs of the third and fourth adaptive equalizers, a first decision unit for receiving the output of the first adder, deciding a received symbol for output, and outputting a decision error, a second decision unit for receiving the output of the second adder, deciding a received symbol for output, and outputting a decision error, and a multiplexing circuit for multiplexing the received symbols output from the first and second decision units, for output. The decision error from the first decision unit is supplied to the first and second adaptive equalizers, and the decision error from the second decision unit is supplied to the third and fourth adaptive equalizers.

A decision feedback equalizing apparatus and a method of decision feedback equalization make a channel property of an inferior receiving signal to mild by using a channel-matched filter and decrease decision errors of symbol detector output signals by using a trellis decoder with decreased complexity, whose trace back depth is 1 (TBD=1).

A method of detecting and correcting bit errors in a digitally encoded data stream includes correlating a received bit transition in the data stream with a multitude of possible bit transitions to generate corresponding correlated bit transition values. A bit transition decision corresponding to a greatest correlated bit transition value is then generated for the received bit transition. Consecutive bit transition decisions generated for the data stream are compared to identify bit transition decision errors. Respective bit transition decisions are examined to determine if each decision is consistent with a prior adjacent bit transition decision in the data stream. If a bit transition decision error is identified, then the next greatest correlated bit transition decision is substituted for the bit transition decision in error.

A communication system and a method which can reduce the effect of burst noise. The communication system comprises a controllable oscillator, a mixer, a decision circuit, a comparator, a loop filter, and a controller. The controllable oscillator generates an oscillating signal. The mixer coupled to the controllable receives input data and mixes the input data with the oscillating signal. The decision circuit receives the mixed input data and generates an estimated symbol. The comparator generates a decision error between the estimated symbol and the mixed input data. The loop filter coupled to the controllable oscillator filters the decision error, and generates a filtered decision error, and the controllable oscillator generates the oscillating signal according to the filtered decision error. The controller reduces a bandwidth of the loop filter according to the decision error.

In MIMO wireless communications employing LMMSE receiver, the symbols transmitted through a transmit antenna are estimated at the receiver in the presence of interference consisting of two main components: one due to the additive noise and the other due to (interfering) symbols transmitted via the remaining antennas. This has been shown to hamper the performance of a communication system resulting in incorrect symbol decisions, particularly at low SNR. IMMSE has been devised as a solution to cope with this problem; In IMMSE processing, the symbols sent via each transmit antenna are decoded iteratively. In each stage of processing, the received signal is updated by removing the contribution of symbols detected in the previous iterations. In principle, this reduces the additive interference in which the desired symbols are embedded in. Therefore, the interference level should reduce monotonically as one goes down in processing order. In a noisy environment, however, any incorrect decision made on a symbol in an iteration leaves its contribution in the updated received signal available for processing in the following iterations. Fortunately, if the level of interference is estimated and the soft bits are scaled appropriately by the estimated interference power, the performance of IMMSE receiver can be greatly improved. Preferred embodiments estimate the interference by computing the probability of error in decoding the symbols of the previous stage(s). The computation of decision error probability depends on the constellation size of transmitted symbols and introduces very little processing overhead.

The soft decision thresholds in a soft decision forward error correction (FEC) system may be adjusted based on mutual information of a detected signal. In one embodiment, a recursive algorithm may be used to optimize threshold values by maximizing the mutual information. In another embodiment, an adaptive scheme may be used to optimize threshold values based on a pre-knowledge of the noise in the channel. In a further embodiment, an adaptive scheme may be used to optimize threshold values by without pre-knowledge of the noise in the channel.