Methods for transmitting and receiving signals, base station and mobile terminal
A technology of signal transmission and signal reception, which is applied in the field of mobile terminals and base stations, can solve the problems that the mutual interference between MUROS users cannot be eliminated, the overlapping interference between MUROS users cannot be eliminated, and the signals cannot be guaranteed to be orthogonal to each other, so as to eliminate mutual interference and improve The effect of the performance gain
Inactive Publication Date: 2012-07-11
CHINA MOBILE COMM GRP CO LTD
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Problems solved by technology
[0007] Since the GMSK modulation symbols are generally complex numbers, the linear superposition of GMSK signals cannot eliminate the superposition interference between MUROS users, even if the Co-TCH technology is used, it cannot guarantee that the signals transmitted by two users multiplexed in the same slot in the downlink are Mutually orthogonal, so that mutual interference between MUROS users cannot be eliminated
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[0034] The uplink / downlink signal transmission scheme proposed by the embodiment of the present invention is as follows: respectively perform MSK modulation on the signals to be transmitted corresponding to two users, and perform phase rotation on at least one of the two modulated signals, so that the two The modulated signals are orthogonal to each other, and the two orthogonal signals are sent in the same time slot.
[0035] The specific implementation manners of the present invention will be described below in conjunction with the accompanying drawings.
[0036] Figure 1a It is a schematic flow diagram of the uplink signal sending method proposed by the embodiment of the present invention, and the specific flow is described as follows:
[0037] Step 11: Insert the training sequence assigned to the first user by the network side into the data to be sent by the first user, and the first user and the second user send data based on the same time slot resource;
[0038] Two us...
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The invention provides a method for transmitting uplink signals. The method comprises the following steps: inserting TSC assigned to a first user by a network side into data of the first user to be transmitted; modulating MSK for the data in which the TSC is inserted; rotating the phase for a signal obtained by the modulation according to an angle 1 of the assigned TSC relative to the first user,wherein the difference of the angle 1 and an angle 2 of the TSC relative to a second user is odd number times of 90 degrees, the network side assigns the TSC to the second user based on the same timeslot resource for sending data, and the angle 1 is equal to the absolute value of an angle 3 of the TSC assigned to the first user relative to the network side, and the angle 1 and the angle 3 have opposite directions; and transmitting the signal after phase rotation in the same time slot resource. The invention also discloses a method for receiving the uplink signals, methods for transmitting andreceiving downlink signals, a mobile terminal and a base station. By adopting the scheme of the invention, signals can not interfere mutually between two users based on same time slot multiplexing onan uplink / downlink signal transmission link.
Description
technical field [0001] The present invention relates to the technical field of mobile communication, in particular to an uplink signal sending method, an uplink signal receiving method, a downlink signal sending method, a downlink signal receiving method, a base station, and a mobile terminal. Background technique [0002] In the existing Global System for Mobile Communication (GSM, Global System for Mobile Communication) / GSM Enhanced Data Rates (EDGE, Enhanced Data rates for GSM Evolution) network, one user exclusively occupies one time slot resource. In order to make full use of the wireless resources of the existing GSM / EDGE network and greatly increase the capacity of the GSM / EDGE network, the Multi-User Reusing One Slot (MUROS, Multi-User Reusing One Slot) technology is fascinating, and the MUROS technology enables two or more Users can use the same time slot resource to transmit their own data at the same time, which can double the capacity of the GSM / EDGE system in th...
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IPC IPC(8): H04L27/20H04L27/22
Inventor 邓娟杨光费泽松
Owner CHINA MOBILE COMM GRP CO LTD