Broadband wireless repeater for mobile communication system
First Claim
1. A broadband wireless repeater for a mobile communication system, comprising:
- a transmission stage comprised of, a Radio Frequency (RF) switch for establishing a frequency path for wireless repeating signals at the same frequencies, an Intermediate Frequency (IF) delay unit for applying delay to IFs in the case of interference signal measurement, and bypassing the IF delay in the case where a service is being provided, a frequency up conversion modulator for increasingly modulating frequencies of a transmission path, an amplifier for amplifying transmission signals, a filter unit for eliminating undesired band signals from the transmission signals, and a transmitting side antenna for receiving signals outputted from the amplifier and transmitting the outputted signals to a shadow area or an urban area; and
a receiving stage comprised of, an array antenna for receiving radio frequency signals from a base station and interference signals fed back from the transmitting antenna, a band-pass filter unit for eliminating undesired band signals from the signals received by the array antenna, an amplifier for amplifying only original signals of the RF signals received by the array antenna while suppressing noise components of the signals, thus improving sensitivity of the received signals, a phase shifter for controlling phases of channels, a frequency down conversion modulator for decreasingly modulating frequencies of the received signals, a phase comparison unit for controlling amplitudes of the channels and comparing the phases of the channels with each other, a gain comparison unit for detecting, on the basis of a channel No. 1, phases of the modulated signals of the channels, and comparing gain differences with each other, a vector value optimizer for selecting phase and amplitude values of one of the channels having a small error rate for its main signal by using the phase information of the phase comparison unit, or applying phases and amplitudes of other channels, thus decreasing errors of the main signals with a maximum output, and a synthesizing module for detecting and storing output levels of the channels.
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Accused Products
Abstract
Disclosed herewith is a broadband wireless repeater for a mobile communication system. The broadband wireless repeater generally includes a transmission stage and a receiving stage. The transmission stage includes an RF switch for establishing a frequency path, an Intermediate Frequency delay unit for applying delay to IFs and bypassing the IF delay, a frequency up conversion modulator, an amplifier, a filter unit for eliminating undesired band signals, and a transmitting side antenna. The receiving stage includes an array antenna, a band-pass filter unit for eliminating undesired band signals, an amplifier, a phase shifter for controlling phases of channels, a frequency down conversion modulator, a phase comparison unit, a gain comparison unit, a vector value optimizer for decreasing errors of the main signals with a maximum output, and a synthesizing module for detecting and storing output levels of the channels.
307 Citations
4 Claims
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1. A broadband wireless repeater for a mobile communication system, comprising:
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a transmission stage comprised of, a Radio Frequency (RF) switch for establishing a frequency path for wireless repeating signals at the same frequencies, an Intermediate Frequency (IF) delay unit for applying delay to IFs in the case of interference signal measurement, and bypassing the IF delay in the case where a service is being provided, a frequency up conversion modulator for increasingly modulating frequencies of a transmission path, an amplifier for amplifying transmission signals, a filter unit for eliminating undesired band signals from the transmission signals, and a transmitting side antenna for receiving signals outputted from the amplifier and transmitting the outputted signals to a shadow area or an urban area; and
a receiving stage comprised of, an array antenna for receiving radio frequency signals from a base station and interference signals fed back from the transmitting antenna, a band-pass filter unit for eliminating undesired band signals from the signals received by the array antenna, an amplifier for amplifying only original signals of the RF signals received by the array antenna while suppressing noise components of the signals, thus improving sensitivity of the received signals, a phase shifter for controlling phases of channels, a frequency down conversion modulator for decreasingly modulating frequencies of the received signals, a phase comparison unit for controlling amplitudes of the channels and comparing the phases of the channels with each other, a gain comparison unit for detecting, on the basis of a channel No. 1, phases of the modulated signals of the channels, and comparing gain differences with each other, a vector value optimizer for selecting phase and amplitude values of one of the channels having a small error rate for its main signal by using the phase information of the phase comparison unit, or applying phases and amplitudes of other channels, thus decreasing errors of the main signals with a maximum output, and a synthesizing module for detecting and storing output levels of the channels. - View Dependent Claims (2, 3, 4)
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Specification