摘要:
Method for transmitting a power control bit and for detecting a power control rate, in which a transmission pattern of power control bits is varied with a power control rate, for making blind detection of the power control rate varied from time to time possible, wherein, when change of the power control rate is required, a base station (or a mobile station) generates the transmission pattern of the power control bits varied with the power control rate to be changed, and transmits to the mobile station (or base station), and the mobile station (or the base station) determines the changed power control rate from the received transmission pattern of the power control bits, thereby permitting stable detection of the power control rate varied from time to time.
摘要:
A battery management system to set an OCV setting of a battery, and a driving method thereof. The battery management system includes a sensing unit and a main control unit (MCU). The sensing unit measures a voltage of a battery. The MCU controls charging/discharging of the voltage of the battery, generates charge/discharge pulse pattern waveforms, measures and stores maximum and minimum voltages value of at least one pulse pattern among the charge/discharge pulse pattern waveforms, and sets an average of the measured voltage to an OCV setting from which an SOC is determined. The battery management system estimates the SOC while a vehicle is operating.
摘要:
A battery management system and method. The battery management system manages a battery of a hybrid vehicle including a motor, a battery, and a main switch connecting the motor and the battery. The battery management system includes a sensing unit and an MCU. The sensing unit measures the current, the voltage and the temperature of the battery. The MCU integrates the battery current to produce an integrated current value, and determines whether the battery is overcharged or over discharged using the integrated current value.
摘要:
A battery management system and a method of operating the same includes a plurality of battery cells constituting one pack and connected to a battery having at least one pack, and determines an estimated state of charge (SOC) of the battery. The battery management system determines whether or not a pack current flows, and controls a reset of an SOC depending on the determination result. The battery management system sets an OCV idle period associated with a temperature of the battery, and compares the idle period with a time for which the current of the battery does not flow, and sets the reset OCV depending on the comparison result. The battery management system resets the estimated SOC as the reset SOC associated with the reset OCV.
摘要:
A code combining soft handoff method is disclosed. A mobile terminal measures a strength of respective pilot signals received from a plurality of base stations. If the strength of the received pilot signal is higher than a given value, a base station controller allocates a new code pattern to the corresponding base station to additionally receive a signal from the base station. If the strength of the received pilot signal is lower than the specified value, it drops a signal of the corresponding base station. The mobile terminal and the base station change the code pattern of one of the signals from the two base stations into a code pattern different from the code pattern of the other signal.
摘要:
A transmitter using constituent encoders to generate turbo-encoded bit sequence having variable bit order from an information bit is provided. Each constituent encoder encodes a bit to a bit sequence and each bit sequence from respective constituent encoder has same error correction performance in decoding. Each encoded bit sequence is punctured using optimal puncturing pattern based on code rate and the resultant sequences have the same error correction performance. A receiver receives each bit sequence and depunctures with an optimal depuncturing pattern to decode bits efficiently.
摘要:
Method for configuring a transmission chain in a 3GPP2 system for supporting a flexible or variable data rate of an information bitstream in a process for mapping an information bitstream of a data rate on a physical layer, including the steps of (1) channel coding the information bitstreams with bit rates different from each other into turbo codes or convolution codes having a value inverse of 1/coding rate, and (2) repeating coded bitstream when the channel coded bitstream is smaller than a desired interleaving size, and puncturing the coded bitstream when the channel coded bitstream is greater than the desired interleaving size, for matching the channel coded bitstream to the interleaving size.
摘要:
A method and apparatus for determining frame quality in a mobile communication system determines frame quality by estimating a received SIR without using a CRC under a control hold state in which PCBs are only transmitted while no data transmission actually occurs. The method for determining frame quality includes estimating a signal to interference ratio of an allocated traffic channel from PCBs extracted from PCGs of a frame received through the traffic channel and a signal received through a pilot channel received during a section of the PCGs in a state that no data transmission occurs between a mobile station and its control system and the PCBs are only transmitted and received through the traffic channel; and comparing the estimated signal to interference ratio with a preset reference signal to noise power ratio to determine quality of the received frame.
摘要:
An apparatus and a method for controlling forward link power in a CDMA mobile communication system is disclosed. The apparatus comprises a traffic channel correlator for performing a first correlation operation with respect to a code symbol of a CDMA signal received through a traffic channel, a pilot channel correlator for performing a second correlation operation with respect to a code symbol of the CDMA signal received through a pilot channel, a power control bit extractor for extracting a power control bit from the correlation value from the traffic channel which corresponds to a code symbol with a fixed transmission rate, a power estimator for estimating the average of reception power in response to the power control bit extracted by the power control bit extractor and the correlation value from the pilot channel correlator, a comparator for comparing the average reception power estimated by the power estimator with a predetermined power control reference value and generating a deviation of the average reception power from the predetermined power control reference value, and a power control bit generator for generating the final power control bit according to the deviation generated by the comparator.
摘要:
A method of transmitting packet data to a receiver in a communication system using a Hybrid ARQ technique is disclosed. In accordance with one illustrative embodiment of the present invention, an index representative of how much the first packet being transmitted such as a signal-to-noise (Eb/No) ratio is compared to a predetermined threshold value when an error is occurred during the step of decoding the packet. If the index is greater than or equal to the threshold value, the first packet transmitted is stored in a buffer and a receiver requests to transmit a second additional packet encoded with a lower code rate. On the other hand, if the index is less than the threshold value, the receiver requests to re-transmit the first packet encoded with the same code rate.