System and method for simulating interference received by subscriber units in a spread spectrum communication network
First Claim
1. A method for simulating signal interference in a communication system in which information is communicated over at least one communication channel, comprising the steps of:
- determining a first composite signal energy for signal transmission within said communication system over a first set of simulated communication channels;
determining a first average data rate for said first composite signal energy; and
adjusting a level of signal energy transmitted over said at least one communication channel in response to a first interference signal which is based on said first composite signal energy and average data rate.
0 Assignments
0 Petitions
Accused Products
Abstract
A method and apparatus for simulating signal interference in one communication channel within a communication system, such as cellular or wireless subscriber telephone and/or data systems. The communication system may be of a cellular type in which users from a plurality of cells communicate information signals between one another using at least one base station and code division multiple access (CDMA) spread spectrum type communication signals. The base station is included in a first of the cells and has a transmitter from which information is transmitted to subscriber units over at least one communication channel. The disclosed method includes the step of determining a first composite signal energy associated with signal transmission from the base station transmitter over a first set of simulated communication channels. The simulation method further contemplates estimating a first average data rate for the first composite signal energy. Signal power transmitted over the one communication channel is adjusted in accordance with a first interference signal which is based on the first composite signal energy and first average data rate. In a preferred implementation, a determination is also made of a second composite signal energy associated with signal transmissions from base station transmitters in other cells over a second set of simulated communication channels. An estimate is also made of a second average data rate for the second composite signal energy to enable generation of a second interference signal.
174 Citations
45 Claims
-
1. A method for simulating signal interference in a communication system in which information is communicated over at least one communication channel, comprising the steps of:
-
determining a first composite signal energy for signal transmission within said communication system over a first set of simulated communication channels; determining a first average data rate for said first composite signal energy; and adjusting a level of signal energy transmitted over said at least one communication channel in response to a first interference signal which is based on said first composite signal energy and average data rate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. In a wireless communication system in which users communicate information signals between one another using at least one of a plurality of base stations that each include at least one base station transmitter that uses multiple access type communication signals to transfer information over at least one channel, a method for simulating signal interference power in at least said one channel, comprising the steps of:
-
determining a first composite signal energy for signal transmission within said communication system over a first set of simulated communication channels at least being serviced by said at least one base station; determining a first average data rate for said first composite signal energy; and generating a first interference signal having a signal energy based on said first composite signal energy and average data rate. - View Dependent Claims (10, 11, 12, 13, 14)
-
-
15. A method for simulating signal interference in a channel in a communication system in which information is communicated over at least one such communication channel, with said communication system including a first cell having a first base station transmitter from which information is transmitted over said communication channel, comprising the steps of:
-
determining an orthogonal signal energy associated with signal transmission at a first average data rate from said base station transmitter over a first set of simulated communication channels; determining a non-orthogonal signal energy associated with signal transmission at a second average data rate from base station transmitters not located within said first cell; and adjusting power of signal energy transmitted over at least said first communication channel in accordance with said orthogonal and non-orthogonal signal energies. - View Dependent Claims (16, 17, 18, 19)
-
-
20. A system for simulating signal interference in at least one communication channel in a communication system in which a base station in one cell communicates information signals with other users over such communication channels, comprising:
-
means for providing an electronic noise signal; controller means for generating a noise intensity control signal based on a determination of signal energy transmitted by said base station over a first set of simulated channels; and means for adjusting the energy of said noise signal in response to said noise intensity control signal. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
-
-
33. In a communication system in which information is transmitted over at least one communication channel, a system for simulating interference in said at least one communication channel comprising:
-
a source of electronic noise, said electrical noise having a relatively uniform spectral density over a predetermined bandwidth; a controller for generating a first random Gaussian controlled process indicative of signal transmission over a first set of simulated communication channels, said control process being formed based upon first and second Gaussian processes corresponding to a first average data rate and a first average power fluctuation of said signal transmission; a filter, coupled to said source of electronic noise, for filtering said electronic noise in accordance with first said random Gaussian control process; and a transmitter, coupled to said filter, for transmitting said filtered electronic noise over said one communication channel. - View Dependent Claims (34, 35)
-
-
36. Apparatus for simulating signal interference between communication channels in a communication system in which information signals are communicated between users over a plurality of communication channels, comprising:
-
means for determining a first composite signal energy corresponding to signals transmitted within said communication system over a first desired set of simulated channels; means for determining a first normalized data rate for said signals transmitted over said first set of simulated channels; and means for generating a first interference signal with a signal energy based on said first composite signal energy and first normalized data rate. - View Dependent Claims (37, 38)
-
-
39. Apparatus for simulating signal interference between communication channels in a communication system in which information signals are communicated between users over a plurality of communication channels, comprising:
-
an energy selector which outputs a first composite signal energy corresponding to a sum of signal energy for signals transmitted by a first set of a desired number of simulated channels disposed within said communication system; a data rate generator configured to output a first normalized data rate for said signals transmitted by said first set of simulated channels; and a first interference signal generator coupled to said energy selector and said data rate generator which produces a signal with a signal energy based on said first composite signal energy and first normalized data rate. - View Dependent Claims (40, 41, 42, 43, 44, 45)
-
Specification