5 results about "Zero correlation" patented technology

The present disclosure provides a method in a communication device. The method includes: determining whether a configured root sequence index falls within a predetermined range of root sequence indices, wherein the predetermined range is for a restricted set configuration and a zero correlation zone configuration; setting a current root sequence index to the configured root sequence index when the configured root sequence index falls within the predetermined range, or to a smallest root sequence index in the predetermined range when the configured root sequence index does not fall within the predetermined range; and generating, or attempting to generate, at least one random access preamble based on the current root sequence index.

The invention provides a communication method and a related device. The method comprises: a first device determines a time domain resource and a frequency domain resource, the time domain resource comprising Q time domain units, the frequency domain resource comprising K frequency domain units, Q being an integer greater than or equal to 1, and K being an integer greater than or equal to 1; the first device sends a first signal on the Q time domain units and the K frequency domain units, the value of the first signal borne on the time domain unit q and the frequency domain unit k is the product of an element q in a first sequence and an element k in a second sequence, the first sequence is a unit complex exponential sequence, and / or the second sequence is a constant modulus zero correlation sequence. By implementing the method, the low-speed target can be detected.

The invention discloses a communication method, device and system, relates to the field of communication, and aims to solve the problem that a static or low-speed target cannot be perceived. The method comprises the following steps: a first device obtains a first time domain resource comprising M time domain symbols, and sends a first signal on the M time domain symbols; wherein M is an integer greater than 1; the interval between any two time domain symbols in the M time domain symbols is greater than or equal to one time domain symbol; a first signal sent on a time domain symbol a in the M time domain symbols is a product of the second signal and an element a in the scrambling code sequence; the time domain symbol a is a time domain symbol with an index a in the M time domain symbols; the element a in the scrambling code sequence is an element with an index a in the scrambling code sequence; a is an integer greater than or equal to 0, and a is an integer less than M; the length of the scrambling code sequence is M, and the scrambling code sequence is obtained according to a constant modulus zero correlation sequence. The scheme of the invention can be widely applied to the fields of communication technology, artificial intelligence, Internet of Vehicles, smart home networking and the like.

A communication method, an apparatus and a system, which relate to the field of communications, and which are used for solving the problem of stationary or low-speed targets being unable to be sensed. The method comprises: a first device acquires a first time domain resource comprising M time domain symbols, and sends a first signal on the M time domain symbols, wherein M is an integer greater than 1; an interval between any two of the M time domain symbols is greater than or equal to one time domain symbol; the first signal sent on a time domain symbol a amongst the M time domain symbols is a product of a second signal and an element a in a scrambling code sequence; the time domain symbol a is a time domain symbol having an index being a amongst the M time domain symbols; the element a in the scrambling code sequence is an element having an index being a in the scrambling code sequence; a is an integer greater than or equal to 0, and a is an integer less than M; the length of the scrambling code sequence is M, and the scrambling code sequence is obtained on the basis of a constant amplitude zero correlation sequence. The solution of the present application can be widely applied to the technical fields of communications, artificial intelligence, Internet of Vehicles, smart home networking, etc.

The application discloses a construction method and device for generating three-phase complementary triad based on Kronecker product, and belongs to the technical field of communication systems. The construction method comprises the following steps: taking a three-phase complementary triad (a, b, c) with a random length of M as a seed sequence; carrying out bit interleaving on the three-phase complementary triad (a, b, c) to generate a sequence d; taking a three-phase 3*3 complete complementary code K with a random length of N; connecting the complete complementary code K in series into three parts k1, k2 and k3; and respectively obtaining the Kronecker products of the sequence d and k1, k2 and k3. The construction device comprises a control circuit, a switch circuit, six input shift registers, three multipliers and three output shift registers. The sequence length and the zero correlation zone width of the three-phase complementary triad obtained by the application are adjustable, the three-phase aperiodic Z complementary sequence triad and the Golay complementary sequence triad with the maximum zero correlation zone width can be generated, and the application can be applied to orthogonal frequency division multiplexing transmission and channel estimation in a wireless communication process.