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This invention discloses a fractional sampling deviation estimation and compensation method for FBMC systems, including determining training requirements and operating conditions, determining a preset training structure, generating and transmitting FBMC training signals at the transmitter according to the preset training structure, constructing an equivalent complex observation template, obtaining received observations at the target training location, constructing equivalent complex observations suitable for phase processing based on the received observations and the equivalent complex observation template, establishing a linear relationship model between the expanded phase of the training subcarriers and the subcarrier index, calculating the phase slope and estimating the fractional sampling deviation based on the linear relationship model, and performing fractional delay compensation on the received time-domain signal based on the fractional sampling deviation estimate. This invention constructs an equivalent complex observation template based on the preset training structure and the intrinsic interference relationship of FBMC / OQAM, and then constructs equivalent complex observations based on the received observations and the equivalent complex observation template, thereby improving the applicability and stability of fractional sampling deviation estimation and compensation in FBMC systems.

This utility model relates to the field of electrical equipment, and discloses an installation structure, a roller assembly, and a cleaning device. The installation structure is simple, enabling convenient and quick disassembly and installation of the dirt-collecting tank, with high installation efficiency. Furthermore, it exhibits good structural stability and high reliability, preventing the dirt-collecting tank from shaking or shifting after installation. This installation structure is used to install the roller assembly of the cleaning device. The roller assembly includes a bracket and a dirt-collecting tank, with the tank detachably mounted on the bracket. The installation structure includes a cover and a dirt-collecting tank limiting structure. The cover is located at one end of the dirt-collecting tank, covering and connecting to the tank, and is detachably connected to the bracket. The dirt-collecting tank limiting structure is located between the cover and the tank, limiting one end of the tank to the cover.