Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
60 words
A method of rapid Received Signal Strength Indication (RSSI) of a time-dispersed signal having echoes characterized by: obtaining the time-dispersal function of the communications channel upon which the signal is transmitted and determining the energy present among the time-dispersed echoes utilizing the time-dispersal function obtained, whereby the energy present in the time-dispersed echoes is related to the received signal strength.
Claim 2
Independent Claim
60 words
A method of rapid Received Signal Strength Indication (RSSI) of a time-dispersed signal having echoes characterized by: obtaining the time-dispersal function of the communications channel upon which the signal is transmitted and determining the energy present among the time-dispersed echoes utilizing the time-dispersal function obtained, whereby the energy present in the time-dispersed echoes is related to the received signal strength.
Claim 3
Dependent Claim
17 words
A method as claimed in claim 1 above, wherein the channel response is determined via channel sounding.
Claim 4
Dependent Claim
43 words
A method as claimed in claim 1 or 2 above, wherein obtaining the time-dispersal function is characterized by correlating the received signal against a known sequence and wherein determining the energy present is characterized by integrating the energy obtained from the correlation function.
Claim 5
Dependent Claim
25 words
A method as claimed in claim 3 above, wherein correlating is characterized by calculating a sliding correlation of a composite of the signal and echoes.
Claim 6
Dependent Claim
26 words
A method as claimed in claim 3 or 4 above, wherein determining the energy is characterized by summing the energies at relative maxima of the correlations.
Claim 7
Dependent Claim
19 words
A method as claimed in claim 5 above, wherein relative maxima are determined with reference to a threshold level.
Claim 8
Independent Claim
27 words
A method in any one of claims 3 to 6 above, wherein the correlation is complex correlation of a quadrature received signal and a quadrature reference signal.
Claim 9
Dependent Claim
31 words
A method as claimed in claim 7 above, wherein the determining of the energy is characterized by summing the squares of the quadrature components at the relative maxima of the correlations.
Claim 10
Dependent Claim
30 words
A method as claimed in claim 7 or 8 above, wherein the complex correlation is utilized to provide information to a viturbi-algorithm equalizer regarding the time-dispersal characteristics of the channel.
Claim 11
Independent Claim
23 words
A method as claimed in any one of the preceding claims, wherein the RSSI is characterized by a scalar of the energy present.
Claim 12
Dependent Claim
20 words
A method as claimed in claim 10 above, wherein the scalar is characterized by a function of the receiver's gain.
Claim 13
Independent Claim
24 words
A method as claimed in any one of the preceding claims, wherein the RSSI is utilized to establish the requisite gain of the receiver.
Claim 14
Independent Claim
26 words
A method as claimed in any one of the preceding claims, wherein the time dispersal represents a significant fraction or more of the transmitted symbol interval.
Claim 15
Independent Claim
25 words
A method as claimed in any one of the preceding claims, wherein the RSSI is utilized to facilitate handoff decisions in a cellular radiotelephone system.