Tracking short-term maximum power spectrum density for improved visibility of low duty cycle signals
First Claim
1. A method for analyzing wireless activity in a frequency band, comprising:
- a. during a time interval, computing a sequence of short-time power spectrum estimates for energy received in said frequency band, each short-time power spectrum estimate comprising data representing power of the received energy at each of a plurality of frequency bins that span a frequency sub-band at different time instants during said time interval; and
b. accumulating data associated with said sequence of power spectrum estimates.
3 Assignments
0 Petitions
Accused Products
Abstract
A method is provided for analyzing activity in a frequency band that improves over conventional spectrum analyzers by providing the ability to visualize signals or energy with short duty cycles. During a time interval, a sequence of short-time power spectrum estimates is computed for energy received in said frequency band. Each short-time power spectrum estimate comprises data representing power of the received energy at each of a plurality of frequency bins that span a frequency sub-band at different time instants during the time interval. Data associated with the sequence of power spectrum estimates is accumulated. This process is repeated for each of a plurality of different sub-bands that span a frequency band of interest. As a result, activity can be observed in the frequency band of interest over relatively short time intervals, even if the activity has a short duty cycle.
-
Citations
30 Claims
-
1. A method for analyzing wireless activity in a frequency band, comprising:
-
a. during a time interval, computing a sequence of short-time power spectrum estimates for energy received in said frequency band, each short-time power spectrum estimate comprising data representing power of the received energy at each of a plurality of frequency bins that span a frequency sub-band at different time instants during said time interval; and
b. accumulating data associated with said sequence of power spectrum estimates. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A device, comprising:
-
a. a radio receiver that receives wireless energy in a frequency band and produces a receive signal representative thereof;
b. an analog-to-digital converter coupled to the radio receiver that converts the receive signal to digital data;
c. a power spectrum computation circuit coupled to the analog-to-digital converter that computes short-time power spectrum estimates for energy received in said frequency band from the digital data; and
d. a control unit connected to said power spectrum computation circuit and to said radio receiver, wherein the control unit controls the power spectrum computation circuit to compute a sequence of short-time power spectrum estimates for energy received in said frequency band, each short-time power spectrum estimate comprising data representing power of the received energy at each of a plurality of frequency bins that span a frequency sub-band at different time instants during said time interval. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
-
-
21. A processor readable medium storing instructions, that when executed by a processor, cause the processor to perform functions of:
-
a. during a time interval, computing a sequence of short-time power spectrum estimates for energy received in said frequency band, each short-time power spectrum estimate comprising data representing power of the received energy at each of a plurality of frequency bins that span a frequency sub-band at different time instants during said time interval; and
b. accumulating data associated with the sequence of power spectrum estimates. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
-
Specification