摘要:
A method and apparatus for a virtual circuit data area within a packet data frame is disclosed. The method may include operating (320) in a multiple connections sharing packet data frame structure with a packet oriented switching wireless access point and a related network for providing data to a wireless communication device engaged in data communications and determining (330) if a pseudo-circuit switched data area within a packet data frame format is optimal for a connection. The method may also include setting up (340) a virtual circuit data area within a packet data frame using a control configuration if a pseudo-circuit switched data area within a packet data frame format is optimal for a connection and sending (350) data in the virtual circuit data area.
摘要:
A communication device converts a bit stream to multiple symbols and provides encryption at a physical layer by shifting a phase of each symbol of the multiple symbols to produce multiple encrypted symbols. Each encrypted symbol of the multiple encrypted symbols is modulated with an orthogonal subcarrier to produce at least one modulated subcarrier and the at least one modulated subcarrier is then transmitted via a wireless link. On a receive side, a receiving communication device receives the transmitted, encrypted symbols and provides decryption at a physical layer by shifting a phase of each encrypted symbol in correspondence with the phase used to encrypt the symbol at the transmit side.
摘要:
Method and apparatus to provide a pseudo random noise (PN) sequence having a particular code phase offset for use in a radio in a Code Division Multiple Access (CDMA) radio system (100). In one embodiment, a first mask (320) is applied to shift a reference PN sequence to the assigned PN code phase (416). Upon reaching the end of the reference PN sequence, the initial state is reloaded (420) into the PN generator state register to reset the state value to its initial value, thereby producing a cyclical sequence. In a second embodiment, a first mask (622) and a second mask (624) are applied to the reference sequence produced by the PN generator state registers (620) to produce the appropriate portions of the output sequence.
摘要:
An apparatus (10) for adjusting peak-to-average power of a multicarrier signal. The apparatus (10) comprises a first (26) and second (28) combiner, a phase-changing device (30), and a switch (36). The first combiner (26) receives a first group of channels (20) and a second group of channels (22) and produces a first combined signal (46). The phase-changing device (30) receives the first group of channels (20) and produces a group of phase-adjusted channels. The second combiner (28) receives the phase-adjusted channels and the second group of channels (22) and produces a second combined signal (48), and the switch (36) responds to the first (26) and second (28) combiners and selects at least one of the first (46) and second (48) combined signals.
摘要:
Generally stated, an apparatus and method for routing a digitized radio frequency (RF) signal 140-143 to a plurality of paths is described herein. In accordance with a first preferred embodiment, the apparatus comprises a digital upconverter/modulator (DUC) 125, 129 coupled to a scaling and switching network 100N which is comprised of, at minimum, a first, second, third and fourth digital switch, and a first, second and third adder. Within the scaling and switching network 100N, the first digital switch is responsive to the DUC 125,129. The first adder is responsive to the first and second digital switches, while the second adder is responsive to the third and fourth digital switches. Finally, the third adder is responsive to the first and second adders.
摘要:
In a quantization noise reduction circuit (200), a feedback signal (W)is added to an input signal (X) to the quantization circuit to reduce quantization noise. The feedback signal is generated as a filtered difference between a sample of a N bit signal (X') and a time coincident sample of a M bit quantized signal, where M
摘要:
A multi-channel digital transceiver (400) receives uplink radio frequency signals and converts these signals to digital intermediate frequency signals. Digital signal processing, including a digital converter module (426), is employed to select digital intermediate frequency signals received at a plurality of antennas (412) and to convert these signals to baseband signals. The baseband signals are processed to recover a communication channel therefrom. Downlink baseband signals are also processed and digital signal processing within the digital converter module (426) up converters and modulates the downlink baseband signals to digital intermediate frequency signals. The digital intermediate frequency signals are converted to analog radio frequency signals, amplified and radiated from transmit antennas (420).
摘要:
In the present technique of data transmission management provided, a composite status indicator value is assessed (716) based on multiple channel quality indicator reports over a predefined time. The assessed composite status indicator value is compared (718) to a first threshold value. If the assessed composite status indicator value does not correspond in at least a predetermined way to the first threshold value, the mobile station is classified (720) in a high speed data region. Otherwise, the assessed composite status indicator value is further compared (726) to a second threshold, and if it corresponds in at least a predetermined way to the second threshold, the mobile station is classified (734) in the low speed data region.
摘要:
A method, information processing system, and wireless communication system schedules transmission of data packets in a wireless communication network. At least one selected data packet to be retransmitted to at least one respective receiver (108) is identified. At least one respective selected data packet is scheduled for retransmission (620) in a set of available transmission slots to at least one respective receiver (108). The scheduling is performed prior to determining a failure of a previous communication of the selected data packet and in response to the identifying.
摘要:
A communication device converts a bit stream to multiple symbols and provides encryption at a physical layer by shifting a phase of each symbol of the multiple symbols to produce multiple encrypted symbols. Each encrypted symbol of the multiple encrypted symbols is modulated with an orthogonal subcarrier to produce at least one modulated subcarrier and the at least one modulated subcarrier is then transmitted via a wireless link. On a receive side, a receiving communication device receives the transmitted, encrypted symbols and provides decryption at a physical layer by shifting a phase of each encrypted symbol in correspondence with the phase used to encrypt the symbol at the transmit side.