Wireless receiver applicable to multiple coexisting positioning systems
First Claim
1. A wireless receiver for receiving a plurality of co-existing wireless signals from different positioning systems, comprising:
- an analog frontend, for converting bands of the plurality of co-existing wireless signals into a plurality of corresponding intermediate bands by a local frequency, and providing an intermediate signal comprising the plurality of intermediate bands;
an analog-to-digital converting unit, coupled to the analog frontend, for converting the intermediate signal to a digital signal, wherein an operation band of the analog-to-digital converting unit covers the plurality of intermediate bands;
a mixing portion for retrieving a plurality of baseband signals corresponding to the plurality of positioning systems in response to the digital signal, wherein the baseband signals comprise a plurality of I-branch baseband signals and a plurality of Q-branch baseband signals; and
a processing portion arranged to map a first one of the I-branch baseband signals and a first one of the Q-branch baseband signals respectively to a real portion and an imaginary portion of a first constellation, and to map a second one of the I-branch baseband signals and a second one of the Q-branch baseband signals respectively to a real portion and a negative imaginary portion of a second constellation.
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Accused Products
Abstract
Wireless receiver for receiving a plurality of co-existing wireless signals respectively from different positioning systems, includes an analog frontend and an analog-to-digital converting unit. The analog frontend is arranged to convert bands of the co-existing wireless signals into a plurality of corresponding intermediate bands by a local frequency and to provide an intermediate signal including the intermediate bands. The analog-to-digital converting unit is coupled to the analog frontend, and is arranged to convert the intermediate signal to a digital signal, wherein an operation band of the analog-to-digital converting unit covers the plurality of intermediate bands.
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Citations
18 Claims
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1. A wireless receiver for receiving a plurality of co-existing wireless signals from different positioning systems, comprising:
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an analog frontend, for converting bands of the plurality of co-existing wireless signals into a plurality of corresponding intermediate bands by a local frequency, and providing an intermediate signal comprising the plurality of intermediate bands; an analog-to-digital converting unit, coupled to the analog frontend, for converting the intermediate signal to a digital signal, wherein an operation band of the analog-to-digital converting unit covers the plurality of intermediate bands; a mixing portion for retrieving a plurality of baseband signals corresponding to the plurality of positioning systems in response to the digital signal, wherein the baseband signals comprise a plurality of I-branch baseband signals and a plurality of Q-branch baseband signals; and a processing portion arranged to map a first one of the I-branch baseband signals and a first one of the Q-branch baseband signals respectively to a real portion and an imaginary portion of a first constellation, and to map a second one of the I-branch baseband signals and a second one of the Q-branch baseband signals respectively to a real portion and a negative imaginary portion of a second constellation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A wireless receiver for receiving a plurality of co-existing wireless signals from different positioning systems, comprising:
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a mixer, for mixing the plurality of the co-existing wireless signals with a local oscillation signal of a local frequency to provide a mixed signal; a low pass filter, coupled to the mixer, for filtering the mixed signal to provide an intermediate signal, wherein the intermediate signal comprises a plurality of intermediate bands respectively converted from bands of the plurality of co-existing wireless signals by the local frequency; an analog-to-digital converting unit, coupled to the low pass filter, for converting the intermediate signal to a digital signal, wherein an operation band of the analog-to-digital converting unit covers the plurality of intermediate bands; and a digital block, coupled to the analog-to-digital converting unit, for retrieving a plurality of baseband signals respectively in response to the plurality of intermediate bands; wherein the baseband signals comprise a plurality of I-branch baseband signals and a plurality of Q-branch baseband signals, and the digital block is further arranged to map a first one of the I-branch baseband signals and a first one of the Q-branch baseband signals respectively to a real portion and an imaginary portion of a first constellation, and to map a second one of the I-branch baseband signals and a second one of the Q-branch baseband signals respectively to a real portion and a negative imaginary portion of a second constellation. - View Dependent Claims (13, 14)
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15. A wireless receiver for receiving a plurality of co-existing wireless signals from different positioning systems, comprising:
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an I-branch mixer, for mixing the plurality of the co-existing wireless signals with an I-branch local oscillation signal of a local frequency to provide an I-branch mixed signal; a Q-branch mixer, for mixing the plurality of the co-existing wireless signals with a Q-branch local oscillation signal of the local frequency to provide a Q-branch mixed signal;
wherein a phase of the I-branch local oscillation signal is different from the Q-branch local oscillation signal;an I-branch low pass filter, coupled to the I-branch mixer, for filtering the I-branch mixed signal to provide an I-branch intermediate signal which comprises a plurality of I-branch intermediate bands respectively converted from bands of the plurality of co-existing wireless signals by the I-branch local oscillation signal; a Q-branch low pass filter, coupled to the Q-branch mixer, for filtering the Q-branch mixed signal to provide a Q-branch intermediate signal which comprises a plurality of Q-branch intermediate bands respectively converted from the bands of the plurality of co-existing wireless signals by the Q-branch local oscillation signal; an I-branch analog-to-digital converter, for converting the I-branch intermediate signal to an I-branch digital signal; a Q-branch analog-to-digital converter, for converting the Q-branch intermediate signal to a Q-branch digital signal; and a digital block coupled to the I-branch analog-to-digital converter and the Q-branch analog-to-digital converter, for retrieving a plurality of I-branch baseband signals respectively corresponding to the plurality of positioning systems from the I-branch digital signal, and retrieving a plurality of Q-branch baseband signals respectively corresponding to the plurality of positioning systems from the Q-branch digital signal, and mapping a first one of the retrieved I-branch baseband signals and a first one of the retrieved Q-branch baseband signal respectively to a real portion and an imaginary portion of a first constellation, and mapping a second one of the retrieved I-branch baseband signals and a second one of the retrieved Q-branch baseband signals respectively to a real portion and a negative imaginary portion of a second constellation. - View Dependent Claims (16, 17, 18)
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Specification