Receiver

Simple SummaryContent extracted from patent full text and abstract with AI.

This patent describes a receiver system designed to extract a weak secondary signal and bitstream that are transmitted alongside a much stronger primary signal—where the two signals use different communication standards—over the same physical transmission channel. The receiver detects and reconstructs the stronger primary signal, subtracts it from the combined signal, and then processes the resulting signal to recover the weaker secondary signal. Advanced signal processing, including channel estimation, equalization, and remodulation, is used for accurate separation and recovery of both signals.

Use CasesContent extracted from patent full text and abstract with AI.

• Simultaneous transmission of multiple services (such as TV, emergency alerts) over a single broadcast channel using different standards.
• Cellular and wireless infrastructure that needs to combine legacy (older) and new (advanced) communication protocols on the same frequency band.
• Deployment in dense urban environments where spectrum sharing and signal interference are common challenges.
• Broadcasting secondary data services (like local information, updates, or advertisements) alongside primary content without requiring extra bandwidth.
• Mobile devices or base stations that need to operate in regions with mixed transmission standards (e.g., during technology transitions, upgrades, or migration phases).
• Satellite communication where multiple signals sharing the same downlink channel must be separated and processed individually.

BenefitsContent extracted from patent full text and abstract with AI.

• Enables reliable reception of weak signals even in the presence of much stronger interfering signals.
• Allows for efficient utilization of available spectrum by enabling simultaneous transmission of signals using different standards over the same channel.
• Facilitates smooth migration and coexistence of legacy and new communication systems without requiring separate channels.
• The subtraction and signal reconstruction technique increases receiver sensitivity and signal separation accuracy.
• Supports advanced features in communication systems, allowing diverse services (such as public safety, data, and entertainment) to be delivered together.
• Reduces infrastructure costs by minimizing the need for multiple dedicated channels and improving channel-sharing capabilities.

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

An embodiment of the invention relates to a receiver capable of receiving a secondary bitstream which is transmitted by a secondary signal over a physical transmission channel together with a primary signal having higher signal strength than the secondary signal, said primary signal being generated according to a first transmission standard and said secondary signal being generated according to a second transmission standard, which differs from the first transmission standard; said receiver comprising: a down-converter configured to convert an input signal that contains said primary and secondary signal, to a baseband complex symbol stream; a first signal processing unit configured to process the baseband complex symbol stream and to provide a primary bitstream transmitted by said primary signal or a decoded primary log-likelihood ratio stream; a symbol reconstructing unit configured to process the primary bitstream or the decoded primary log-likelihood ratio stream and to provide a reconstructed primary symbol stream; a subtraction unit configured to provide a difference symbol stream by substracting the baseband complex symbol stream and the reconstructed primary symbol stream from each other, said difference symbol stream describing the baseband complex symbol stream without the primary signal; and a second signal processing unit configured to process the difference symbol stream and to provide the secondary bitstream transmitted by said secondary signal.