摘要:
The present invention provides a versatile system for optimizing data fragmentation in a digital communications—particularly OFDM communications—system. A digital transmission system (100) is provided, having a PHY-level constraint. An array (104, 112) of data transmission parameters (106-110, 114-116), relating to the digital transmission system, is provided. A fragmentation construct (102) is provided, and adapted to determine a number of symbols required to transmit a given data transmission payload. The fragmentation construct calculates (118), based on the number symbols required, and on certain parameter information from the array, a number of bytes of data that must be transmitted in the given data transmission payload in order to minimize pad bits added to the data transmission payload.
摘要:
A system is provided that includes a first device and a second device. The second device is configured to communicate wirelessly with the first device. The first and second devices selectively reduce an operational range for communications before sharing a secret, the secret related to data encryption.
摘要:
A dual mode decoder operable with external memory. At least some of the illustrative embodiments are integrated circuit products comprising a processor portion, a memory portion coupled to the processor portion, and a hardware demodulation portion coupled to the processor portion. The processor portion and hardware demodulation portion work together to demodulate a first digital transmission signal created utilizing a first modulation system, and the processor portion and hardware demodulation portion work together to decode a second digital transmission signal created using a second modulation system different than the first modulation system (the second digital signal having at least one time interleaved segment). The integrated circuit product couples to an external memory for purposes of time de-interleaving when an amount of memory of the memory portion is insufficient for time de-interleaving for a number of segments of the second digital transmission signal.
摘要:
In at least some embodiments, a method for mitigating interference between an Ultra Wideband (UWB) device and a non-UWB device is provided. The method includes, dynamically determining if a frequency channel associated with the non-UWB device is being used. If the frequency channel is being used, the method adjusts a UWB frequency band used for UWB signal transmission.
摘要:
The present invention provides a versatile system for selectively altering or shaping transmission signals in an ultra-wideband communications system (100). The system provides a serial to parallel conversion function (102) with a serial data input (116). The serial to parallel conversion function converts the serial data and outputs it in parallel format. An adjustment function (104) receives the now parallel data and selectively alters the parallel data responsive to some code or vector (118). A frequency-to-time-domain conversion function (106) receives the selectively altered parallel data and transmits it to a parallel-to-serial conversion function 108. The now serial data transfer through an OFDM prefix/suffix function 110 and a digital-to-analog conversion function 112, to an up conversion mixer function 114. Encoded digital data bits are input, converted to parallel format, and passed to the spectrum adjustment function, which provides selective adjustment of specific data units (i.e., specific OFDM sub-carriers or tones).
摘要:
An integrated circuit (IC) includes at least one programmable digital logic cell that includes first dedicated digital logic cell having a plurality of transistors including at least one PMOS transistor and at least one NMOS transistor configured to perform at least one digital logical function. The first dedicated digital logic cell includes a plurality of nodes including at least one input node and at least one output node that reflects performance of a digital logical function. Programmable tuning circuitry includes at least one tuning input and at least one tuning circuit output. Circuitry for coupling or decoupling the tuning input or tuning circuit output to at least one of the plurality of nodes of the first dedicated digital logical cell is provided, wherein the coupling or decoupling is operable to change the processing speed for the first reprogrammable digital logic cell.
摘要:
A system is provided that includes a first device 110A that transmits an information symbol with a zero-padded suffix (ZPS) and a second device 110B that receives the information symbol with the zero-padded suffix. The second device 110B performs a Fourier transform on at least one sample of the information symbol before a ZPS sample is overlapped-and-added to another sample of the information symbol.
摘要:
The distance between a first Multi Band Orthogonal Frequency Division Multiplex (MB-OFDM) data transceiver and a second or more such transceiver is determined using known techniques. The radio frequency path loss between transceivers is estimated given said distance, using a known relationship between distance and path loss, and further accounting for line-of-sight or non-line-of-sight conditions if desired. This path loss value is added to the typically minimum transmit power level, absent path loss, needed for reliable data communication. This modified initial transmit power level is then used by the first transceiver to begin the known iterative feedback process of transmit power control (TPC). Because this modified initial transmit power level, based on distance, is closer to the final optimum level, convergence in the TPC process occurs in fewer steps and less time than had the initial transmit power been maximum power as is typical in known TPC systems.
摘要:
The present invention provides a versatile system for optimizing data fragmentation in a digital communications—particularly OFDM communications—system. A digital transmission system (100) is provided, having a PHY-level constraint. An array (104, 112) of data transmission parameters (106-110, 114-116), relating to the digital transmission system, is provided. A fragmentation construct (102) is provided, and adapted to determine a number of symbols required to transmit a given data transmission payload. The fragmentation construct calculates (118), based on the number symbols required, and on certain parameter information from the array, a number of bytes of data that must be transmitted in the given data transmission payload in order to minimize pad bits added to the data transmission payload.
摘要:
A system and method are provided that are operable for network communications that promote network devices to receive a transmit request, transmit a first part of a frame by a physical layer without a second part of the frame from a medium access control layer, and request the second part of the frame by the physical layer from the medium access control layer. These systems and methods also allow, in some embodiments, for the transmitting of the second part of the frame by the physical layer with data from the medium access control layer.