초록 ▼

A peak and valley detection system and method are shown for a selective call receiving device (10). The peak and valley detection system quickly and accurately detects and tracks to the peak and valley of a two level and/or four-level signal. A signal value representing a received signal is compared

A peak and valley detection system and method are shown for a selective call receiving device (10). The peak and valley detection system quickly and accurately detects and tracks to the peak and valley of a two level and/or four-level signal. A signal value representing a received signal is compared by a CPU (28) to the sum of a peak variable and attack constant. The peak variable is updated to a first value if the received signal value is less than the sum and is updated to a second value if the received signal value is not less than the sum. Similarly, the received signal is compared by the CPU (28) to a difference between a valley variable and attack constant. The valley variable is updated to a third value if the received signal value is greater than the difference value and updated to a fourth value if the received signal value is not greater than the difference value. The peak and valley variables attack and decay at non-constant rates and independently of one another.

대표청구항 ▼

In a selective call receiving device, a system for detecting a peak and a valley of a received signal, comprising: a receiver for receiving a signal; a memory for storing a received signal value representing said received signal; a peak comparator for comparing said received signal value to a sum of

In a selective call receiving device, a system for detecting a peak and a valley of a received signal, comprising: a receiver for receiving a signal; a memory for storing a received signal value representing said received signal; a peak comparator for comparing said received signal value to a sum of a peak variable and an attack constant to determine if the received signal value is less than said sum; and a peak generator for setting said peak variable to a first value if said received signal value is less than said sum and to a second value if said received signal value is not less than said sum to update said peak variable, said first value being greater than said second value.