Topic
Bit-count integrity
About: Bit-count integrity is a research topic. Over the lifetime, 5 publications have been published within this topic receiving 12 citations.
Papers
1 Oct 1984
TL;DR: Data is presented showing improved burst error and bit integrity performance for this codec when interfaced to an MD-1002/G offset QPSK modem and results indicate that bit count integrity can be maintained under severely degraded channel conditions where bit integrity would otherwise have been lost.
Abstract: An error correction coding device has been developed that combines the functions of forward error correction with interleaving for burst and random error protection, and the ability to detect and correct for bit count integrity losses out of the demodulator. The burst errors and bit count integrity losses are a result of various perturbations on the communication channel that result in the demodulator failing to correctly track the carrier. This problem is particulary noticeable in offset QPSK modulation. Data is presented showing improved burst error and bit integrity performance for this codec when interfaced to an MD-1002/G offset QPSK modem. The results indicate that bit count integrity can be maintained under severely degraded channel conditions where bit integrity would otherwise have been lost.
8 citations
Patent•
18 May 1979TL;DR: In this paper, a multiplexer system providing a transmission frame field containing information derived from the cumulative total of stuff bits used over a plurality of frames is described. And the demultiplexer uses the information derived in order to improve the bit count integrity performance of data channeled out to a user device.
Abstract: A multiplexer system providing a transmission frame field containing information derived from the cumulative total of stuff bits used over a plurality of frames. The stuff bits which also have assigned positions in the transmission frame are generally used in asynchronous systems to compensate for the input data rate of a group not being a fixed submultiple of the transmission rate. The demultiplexer system uses the information derived from the cumulative total to improve the bit count integrity performance of data channeled out to a user device. Also, during transmission fade conditions, the demultiplexer uses information derived from the frequency of past stuff operations to maintain group bit count close to its expected value.
4 citations
11 Oct 1993
TL;DR: Precise time and frequency play an increasingly important role in digital communications systems and networks and to ensure that the accumulation of frequency offset and time interval error (TIE) is consistent with end-to-end performance objectives.
Abstract: Precise time and frequency (PT&F) play an increasingly important role in digital communications systems and networks. Precise time is required for entry into the network, network synchronization, and link acquisition. Precise frequency is required to maintain synchronization, and to ensure that the accumulation of frequency offset and time interval error (TIE), which may result in loss of bit count integrity (BCI), is consistent with end-to-end performance objectives. >
TL;DR: Test results indicate that a communication station will not disturb the time-division multiple-access network at any signal- to-noise ratio; however, there is a minimum signal-to- noise ratio below which the stations'* ability to remain continuously in the network is impaired.
Abstract: The development of a demonstration 250-Mbps, time-division multiple-access communication link is presented and test results are reported. To establish this demonstration link, a frame synchronizer, a timedivision multiple-access demodulator, and a time-division multiple-access modulator were developed. The prototype system is described with emphasis placed on the test results. Bit error performance, acquisition, characteristics, bit count integrity, and the ability of the station to stay in the network are evaluated. The communication link was designed based on computer simulations. The correlation between the test results and the analytically predicted performance is discussed. Test results indicate that a communication station will not disturb the time-division multiple-access network at any signal-to-noise ratio; however, there is a minimum signal-to-noise ratio below which the stations'* ability to remain continuously in the network is impaired.
Patent•
18 Oct 2007
TL;DR: In this paper, the authors propose a method and an apparatus of providing bit count integrity and synchronous data transfer over a channel which does not preserve synchronization, where a terminal equipment unit produces a constant rate bit stream which is provided to a communication unit.
Abstract: PROBLEM TO BE SOLVED: To provide a method and an apparatus of providing bit count integrity and synchronous data transfer over a channel which does not preserve synchronization. SOLUTION: A terminal equipment unit produces a constant rate bit stream which is provided to a communication unit. The communication unit produces: a first data frame comprising a first set of bits from the constant rate bit stream and a first length field, a second data frame comprising a second set of bits from the constant rate bit stream and a second length field, and a third data frame comprising a third set of bits from the constant rate bit stream and a third length field. The first, second and third data frames are transmitted to a base station, which places the first set of bits from the first frame into a queue. A set of fill bits equal to the maximum number of bits contained in any frame is then placed into the queue. COPYRIGHT: (C)2008,JPO&INPIT
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2007 | 1 |
| 1993 | 1 |
| 1984 | 1 |
| 1983 | 1 |
| 1979 | 1 |