Radio paging system with different transmission speeds and receiver therefor
First Claim
1. A transmitter for a paging system, comprising:
- means for producing a first signal representative of an amount N of interleaving in response to a signal which is representative of a bit rate N·
R, where N is a positive integer and R is a basic bit rate;
interleaving means for interleaving input data having the bit rate N·
R in response to said first signal to produce an interleaved signal, the amount of interleaving being equal to N; and
transmitting means for transmitting said interleaved signal.
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Abstract
A paging system includes a receiver adapted for receiving paging signals at a fixed bit rate of N·R where N is an integer and R is a basic bit rate. A transmitter transmits at the N·R bit rate, N being adjustable to accommodate any signal for any particular receiver. The transmitter bit rate is selected according to serial data received from a telephone exchange with a message to be transmitted. The transmitter has a degree indicating system producing a first signal representative of a degree N when it receives a signal which is representative of a bit rate N·R. It has interleaving means for N-degree interleaving of input data having the bit rate N·R, in response to the first signal, to produce an interleaved signal; and transmitting means for transmitting said interleaved signal. The receiver has means for receiving a signal whose bit rate is N·R bit rate indicating means for outputting a first signal which is representative of N; de-interleaving means for N-degree de-interleaving the received signal, in response to the first signal, to produce a de-interleaved signal; and deciding means for deciding whether or not a paging address number, which may be included in the de-interleaved signal, is assigned to the receiver. Alarm means may produce an audible alarm in response to an output of the deciding means.
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Citations
19 Claims
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1. A transmitter for a paging system, comprising:
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means for producing a first signal representative of an amount N of interleaving in response to a signal which is representative of a bit rate N·
R, where N is a positive integer and R is a basic bit rate;interleaving means for interleaving input data having the bit rate N·
R in response to said first signal to produce an interleaved signal, the amount of interleaving being equal to N; andtransmitting means for transmitting said interleaved signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A receiver for a paging system, comprising:
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receiving means for receiving a signal containing input data whose bit rate is N·
R where N is a positive integer representative of the amount of interleaving and R is a basic bit rate;bit rate indicating means for outputting a first signal which is representative of N; de-interleaving means for de-interleaving the received signal in response to said first signal to produce a de-interleaved signal, the amount of de-interleaving being equal to N; and deciding means for deciding whether or not a paging address number included in said de-interleaved signal is an address number which is assigned to said receiver. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A paging system comprising:
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means for interleaving a paging signal having a bit rate of N·
R where N is a positive integer representative of the amount of interleaving and R is a basic bit rate and transmitting the N-degree interleaved paging signal, the amount of de-interleaving being equal to N; anddeciding means for deciding whether or not said de-interleaved signal includes a desired paging signal. - View Dependent Claims (14)
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15. A paging receiver for receiving and demodulating a digital modulated signal and, when detected, a paging signal of said receiver within a demodulated signal producing an annunciating signal, comprising:
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means for indicating a bit rate N·
R of a signal transmission, where N is a positive integer representative of the amount of interleaving of said demodulated signal and R, a basic bit rate; andmeans for de-interleaving said demodulated signal in response to said bit rate which is indicated by said bit rate indicating means, the amount of de-interleaving being equal to N.
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16. A method of transmitting and receiving a paging signal, comprising the steps of:
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interleaving a paging signal whose bit rate is N·
R where N is a positive integer representative of the amount of interleaving of said demodulated signal and R is a basic bit rate, the amount of de-interleaving being equal to N;transmitting the interleaved paging signal; de-interleaving the transmitted paging signal to produce a de-interleaved signal, the amount of de-interleaving being equal to N; and deciding whether or not said de-interleaved signal includes a desired paging signal. - View Dependent Claims (17)
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18. A method of receiving a paging signal, comprising the steps of:
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receiving a signal whose bit rate is N·
R where N is a positive integer representative of the amount of interleaving and R is a basic bit rate;de-interleaving the received signal to produce a de-interleaved signal, the amount of de-interleaving being equal to N; and deciding whether or not said de-interleaved signal includes a desired paging signal. - View Dependent Claims (19)
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Specification