System and method for reducing noise in a recording receiver
First Claim
1. A method for recording data from a wireless communication transmission comprising:
- disabling at least a portion of non-essential electronics when a receiver is tuned in a receive mode;
starting a capture sequence for the receiver in the receive mode;
receiving the wireless communication transmission and producing a base-band signal with the receiver;
digitizing the complex base-band signal from a captured transmission; and
storing the digitized complex base-band signal in a buffer without further processing such that the effects of noise in the digitized complex base-band signal are minimized by disabling the at least a portion of the non-essential electronics while the digitized complex base-band signal is received.
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Accused Products
Abstract
An apparatus and method is related to wireless communication devices with a reduced-noise recording receiver. The recording receiver receives a transmitted signal, converts the received signal to a digital base-band signal and stores the digitized base-band signal in a buffer for subsequent processing. The stored digital signals are subsequently processed to recover the transmitted data signal. The overall signal integrity in the receiver is improved by performing signal processing after reception is complete. The IF processing section of the receiver includes a frequency band translation section. The frequency band translation section translates the frequency band of the IF signal into a non-harmonically related frequency band. Since the IF signal is in an unrelated frequency band, data can be recovered from the-transmission signal with improved signal-to-noise characteristics. At least a portion of the non-essential electronics are disabled during reception to avoid additional interference and sources of noise.
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Citations
22 Claims
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1. A method for recording data from a wireless communication transmission comprising:
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disabling at least a portion of non-essential electronics when a receiver is tuned in a receive mode;
starting a capture sequence for the receiver in the receive mode;
receiving the wireless communication transmission and producing a base-band signal with the receiver;
digitizing the complex base-band signal from a captured transmission; and
storing the digitized complex base-band signal in a buffer without further processing such that the effects of noise in the digitized complex base-band signal are minimized by disabling the at least a portion of the non-essential electronics while the digitized complex base-band signal is received. - View Dependent Claims (2, 3)
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4. A method for recording data from a wireless communication transmission comprising:
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issuing a shut-down alert;
tuning the receiver to a desired frequency;
disabling at least a portion of non-essential electronics after the shut-down alert and the receiver tuning has settled;
starting a capture sequence for the receiver;
receiving the wireless communication transmission with the receiver and producing a base-band signal;
digitizing the complex base-band signal from a captured transmission;
storing the digitized complex base-band signal in a buffer without further processing;
stopping the capture sequence for the receiver at the expiration of a predetermined time interval; and
enabling the at least a portion of the non-essential electronics after the expiration of the predetermined time interval. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 18, 19)
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12. An apparatus for wireless communication, comprising:
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an antenna that produces an RF signal in response to a FM signal that is in a particular frequency band;
an RF amplifier is coupled to the antenna and produces an amplified RF signal in response to the RF signal;
an IF signal processor is coupled to the RF amplifier and produces an IF signal in response to the amplified RF signal;
a base-band signal processor is coupled to the IF signal processor and produces a base-band signal in response to the IF signal;
a post detector processor is coupled to the base-band signal processor and produces two digital signals in response to the base-band signal, the two digital signals corresponding to a digitized I and Q base-band signal; and
a buffer is coupled to the post detector processor and stores the digitized I and Q base-band signals when active, wherein the digitized I and Q base-band signals are stored in the buffer for post processing such that signal processing may be performed on the stored digitized I and Q base-band signals at a subsequent time after an entire transmission has been received.
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20. An apparatus for wireless communication in a watch having a watch band, comprising:
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an antenna that produces an RF signal in response to a FM signal that is in a particular frequency band, wherein the antenna is formed in the watch-band;
an RF amplifier is coupled to the antenna and produces an amplified RF signal in response to the RF signal;
an IF signal processor is coupled to the RF amplifier and produces an IF signal in response to the amplified RF signal;
a base-band signal processor is coupled to the IF signal processor and produces a base-band signal in response to the IF signal;
a post detector processor is coupled to the base-band signal processor and produces two digital signals in response to the base-band signal, the two digital signals corresponding to a digitized I and Q base-band signal; and
a buffer is coupled to the post detector processor and stores the digitized I and Q base-band signals when active, wherein the digitized I and Q base-band signals are stored in the buffer for post processing such that signal processing may be performed on the stored digitized I and Q base-band signals at a subsequent time after an entire transmission has been received. - View Dependent Claims (21, 22)
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Specification