摘要:
Disclosed are a method of estimating a Doppler frequency shift and a method of transmitting data using the same. The method of estimating the Doppler frequency shift includes the steps of calculating difference values of a received pilot signal between i-th slot and (i−1)-th slot, for i=1, 2, . . . , N; and estimating a Doppler frequency shift based on the difference values.
摘要:
Disclosed are a forward multiple scrambling code generating method and apparatus in a communication system. Each base station uses primary scrambling codes and an associated one of secondary scrambling code sets, each consisting of a plurality of secondary scrambling codes. When an n-th one of the primary scrambling codes is to be generated, an initial value of the scrambling code generator is set with a binary value of “n,” so that a desired primary scrambling code is generated using the initial value. When an n-th one of the secondary scrambling codes in an m-th one of the secondary scrambling code sets is to be generated, an initial value of the scrambling code generator is set with a value obtained by shifting the n-th primary scrambling code by m times, thereby generating a desired secondary scrambling code. Since the primary and secondary scrambling codes are simultaneously generated using a single code generator, the manufacturing costs and load are reduced, and the size and power consumption of user elements are reduced. It is also possible to reduce the number of calculations required to set the initial values required for the generation of scrambling codes.
摘要:
A forward-link power control method is disclosed. The forward power control is performed by receiving at least one reverse link channel that informs channel quality information of a forward link, and determining a power of a channel to be transmitted to the forward link according to the channel quality information.
摘要:
A method of generating a public long code mask for a broadcast/multicast service and apparatus thereof are provided, by which, upon performing the broadcast/multicast service, an overhead of a base station or a mobile terminal can be reduced and a delay occurring in the base station or mobile terminal can be reduced. In a method of carrying out a broadcast/multicast service provided via a channel of a mobile communication system, the method includes steps of receiving a flow identifier indicative of the broadcast/multicast service; and generating, based on the received flow identifier, a public long code mask for the channel providing the broadcast/multicast service.
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:
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.
摘要:
A method for controlling power of a forward common channel is disclosed. The present method allows a base station to obtain an initial power value for a closed-loop power control of mobile stations when a base station transmits data to a plurality of mobile stations through an a forward common channel. Particularly, the present method permits a base station to determine an initial power according to either a variation of reception power transmitted from a mobile station or a variation of the PCBs transmitted from a mobile station.
摘要:
An IS-2000 Rev. A base station enables synchronization of a mobile station configured for receiving, via a sync channel, a sync channel message, based on sending a first sync channel message on the sync channel specifying a first protocol (P_REV=5), and sending a second sync channel message (ESPM) on a common channel (PCH) specifying a second protocol (P_REV=7), enabling the mobile station to synchronize according to one of the first and second protocols based on decoding a corresponding one of the first and second sync channel messages.
摘要:
Disclosed is a method of transmitting/receiving a broadcast message in a mobile communication system enabling to transmit a broadcast message including a video and the like. The present invention proposes an additional broadcast channel so as to transmit a broadcast message such as a video to a mobile station. Moreover, the present invention proposes a method of enabling a mobile station to confirm a summary or channel information so as to demand a broadcast message selectively by previously transmitting information, which is called a data burst summary message or a data burst message by the present invention, about the summary of the broadcast message or a channel through which the broadcast message will be transmitted prior to transmitting the broadcast message having large traffic volume.
摘要:
The present invention relates to the detection of a target nucleic acid sequence by a PCEC (PTO Cleavage and Extension-Dependent Cleavage) assay. The present invention is characterized by generating a cleavage site for a nucleolytic enzyme on the extended duplex of which the formation is dependent on the presence of a target nucleic acid sequence. The present invention detects the occurrence of the cleavage of the extended duplex, thereby determining the presence of the target nucleic acid sequence.