Integrated Signal Receiver
First Claim
1. A signal receiver having:
- an input for receiving radio signals;
a clock;
a receiving section for processing signals received at the input, the receiving section being configured to operate in;
(a) a first mode for processing the received signals in accordance with a first protocol and in dependence on the state of the clock, and (b) a second mode for processing the received signal in accordance with a second protocol by steps including storing a sample of data received in accordance with the second protocol together with a representation of the state of the clock when that data was received, and subsequently comparing a timing indicated by the content of the stored sample of data with the timing indicated by the stored state of the clock.
2 Assignments
0 Petitions
Accused Products
Abstract
A signal receiver having: an input for receiving radio signals; a clock; a receiving section for processing signals received at the input, the receiving section being configured to operate in: (a) a first mode for processing the received signals in accordance with a first protocol and in dependence on the state of the clock, and (b) a second mode for processing the received signal in accordance with a second protocol by steps including storing a sample of data received in accordance with the second protocol together with a representation of the state of the clock when that data was received, and subsequently comparing a timing indicated by the content of the stored sample of data with the timing indicated by the stored state of the clock.
16 Citations
33 Claims
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1. A signal receiver having:
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an input for receiving radio signals; a clock; a receiving section for processing signals received at the input, the receiving section being configured to operate in;
(a) a first mode for processing the received signals in accordance with a first protocol and in dependence on the state of the clock, and (b) a second mode for processing the received signal in accordance with a second protocol by steps including storing a sample of data received in accordance with the second protocol together with a representation of the state of the clock when that data was received, and subsequently comparing a timing indicated by the content of the stored sample of data with the timing indicated by the stored state of the clock. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 31)
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13. A signal receiver having:
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an input for receiving radio signals; a local oscillator for forming a local oscillator signal; at least one mixing stage for mixing with the local oscillator signal a received signal from the input; at least one filter for filtering the output of the mixing stage; the receiver being capable of operating in a first mode for receiving signals in the ISM (industrial, scientific and medical) band and in a second mode for receiving signals of a satellite location protocol, and the frequency divider being configured to divide the output of the local oscillator by a first predetermined value when the receiver is operating in the first mode and to divide the output of the local oscillator by a second predetermined value different from the first value when the receiver is operating in the second mode. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 32)
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25. A signal receiver capable of operating in a first mode for receiving signals in the ISM (industrial, scientific and medical) band and in a second mode for receiving signals of a satellite location protocol, the receiver having a receive chain comprising:
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an input for receiving radio signals; a local oscillator for forming a local oscillator signal; at least one mixing stage for mixing the local oscillator signal and a signal from the input; at least one filter for filtering the output of the mixing stage; at least one analogue-to-digital converter for converting the output of the filter to the digital domain; and a decoder for decoding the output of the or each analogue-to-digital converter to extract traffic data therefrom, the decoder being capable of decoding signals in the ISM (industrial, scientific and medical) band when the receiver is operating in the first mode and decoding signals of the satellite location protocol when the receiver is operating in the second mode; and the receiver being arranged such that the filter(s) and the analog-to-digital converter(s) are unchanged irrespective of whether the receiver is operating in the first or second mode. - View Dependent Claims (26, 27, 28, 29, 30, 33)
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Specification