US 7,864,900 Communication system for sending and receiving digital data
5 defendants · 5 suits · updated September 14, 2026
Also cited as U.S. Patent No. 7,864,900 · US7864900B2 · US 7,864,900 B2 · 7864900 · the '900 patent
CommPlex Systems LLC has filed 5 patent-infringement suits on US 7,864,900, "Communication system for sending and receiving digital data" since July 7, 2026, all in the E.D. Tex., against 5 distinct defendants including Baicells Technologies North America Inc., HMS Industrial Networks AB and Senao Networks, Inc.. The patent was granted January 4, 2011 on a priority date of October 30, 2006. Its abstract opens: "A system and method for constructing a transmitter and a receiver that communicate using multiple orthogonal frequencies which are locked to each other." The examiner cited 6 references during prosecution.
- Assignee
- Commplex Systems LLC
- Priority date
- October 30, 2006
- Granted
- January 4, 2011
- Expires
- October 30, 2026
- Status
- Active - Reinstated
- Claims
- 10 (1 independent)
- Inventors
- Abdullah A. Al-Eidan
- Full text
- Google Patents
The suits
5 cases · E.D. Tex. (5)
| Filed | Defendant | Plaintiff | Court | Docket |
|---|---|---|---|---|
| 2026-07-07 | Baicells Technologies North America Inc. | CommPlex Systems LLC | E.D. Tex. | 2:26-cv-00556 |
| 2026-07-07 | HMS Industrial Networks AB | CommPlex Systems LLC | E.D. Tex. | 2:26-cv-00557 |
| 2026-07-07 | Senao Networks, Inc. | CommPlex Systems LLC | E.D. Tex. | 2:26-cv-00558 |
| 2026-07-07 | Singapore Technologies Engineering Ltd. | CommPlex Systems LLC | E.D. Tex. | 2:26-cv-00559 |
| 2026-07-07 | Zhone Technologies, Inc. | CommPlex Systems LLC | E.D. Tex. | 2:26-cv-00560 |
Docket links open the public record on CourtListener. Filing dates are the complaint's.
Independent claims
What is actually asserted, verbatim.
1. A communication system for sending and receiving data, said system comprising: a transmitter and a receiver wherein a general binary coded Orthogonal Frequency-Division Multiplexing carrier scheme is provided between said transmitter and said receiver to thereby increase code density and data rate per Hz of bandwidth; a plurality of narrow band carrier frequencies, wherein, said narrow band frequencies are orthogonal and are transmitted in a binary code to represent data; and wherein, said narrow band carrier frequencies includes narrow band separation between orthogonal carriers of the order of 0.1 MHz and providing a bandwidth of the order of 3.2 MHz for 32 carriers thereby allowing said bandwidth to transmit at least 6 Mbps in a 2 of 32 Orthogonal Frequency-Division Multiplexing.
Art before the examiner
6 references of record, 6 cited by the examiner.
Everything listed here was before the Office and is what a challenge must go beyond. Art the examiner never saw is where an invalidity search starts.
Examiner-cited
- US5636247A — Information transmission system (Lucent Technologies Inc.)
- US6011499A — Encoding/decoding video signals using multiple run-val mapping tables (Intel Corporation)
- US20030223354A1 — SINR measurement method for OFDM communications systems (Denso Corporation)
- US20040125824A1 — Network delay identification method and apparatus (Preston Dan A.)
- US20050123060A1 — System and method for channelization recognition in a wideband communication system (Intel Corporation)
- US7385915B2 — Apparatus, and associated method, for facilitating communication allocation in a radio communication system (Nokia Corporation)
Classification
- H04L27/10primary — Frequency-modulated carrier systems, i.e. using frequency-shift keying
- H04L27/2626 — Arrangements specific to the transmitter only
- H04L27/2647 — Arrangements specific to the receiver only
Family
- US7864900B2 — B2 (2011)
- US20080101481A1 — A1 (2008)
Abstract
A system and method for constructing a transmitter and a receiver that communicate using multiple orthogonal frequencies which are locked to each other. The set of available frequencies can range from 7, 32 frequencies to a much larger set of frequencies. The transmitted frequencies are separated by a small limited bandwidth (B.W). multiple frequencies are selected from a set of available frequencies and transmitted simultaneously to the receiver. The data transmission is preceded by a calibration sequence where the shift between the transmitted frequency and the frequency measured by fast Fourier transform at the receiver system contain encoders and decoders that convert binary numbers to frequency combinations and the reverse. This transceiver system is capable of transmitting large data rate per unit of a bandwidth e.g. 6 Mbps/3.2 MHZ.
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This page is assembled from public records — federal court dockets and the patent's own file — and is updated as the case list changes. It states what the record shows and is not an opinion on the validity or infringement of any claim. Patent data via Google Patents; docket data via CourtListener.