China started developing Assassin's Mace since 1990s probably and only revealed this around 2010. Since then three generations of anti-ship ballistic missiles developed and with constant improvements I'm sure to the guided part.
It was developed as a counter to America's carrier groups which even a single carrier group is stronger than India's entire navy. The threat level is totally different.
Yes it depends on so many sensor networks and advanced drones and secret satellite technologies. No one else really has true anti ship ballistic missile with those sensor networks and the US navy is strong to require at least this much ability. HGV is the new paradigm which integrates everything as well and further enhance this counter. It is no cheap and easy task.
Why does Pakistan require such a network that is super expensive to upkeep?
India has very poor air defence for its navy. Three Kolkata only has 96 Barak-8 missiles. They must fire two per target otherwise it is too risky. Combined with total air defence, they have around 300 air defence missiles which is good for 150 attacking missiles. Of course things are not so simple but also remember much better for the attacking side. Their Mig-29K cannot do that much honestly and to destroy Indian carriers, PAF is considered up to the task. It just needs more anti-ship missiles and more fighters to counter IAF and Mig-29K from carriers.
India daring to use its carriers on Pakistan will invite full assault on weakly defended carriers. Each US Navy carrier group has more firepower than all of India's modern navy combined.
So your argument is we should work on supersonic and hypersonic cruise missiles.again we will have to make progress in satellites to cover our coastal areas.
What satellite system Iran have? They have built many anti ship BMs.if they can guide their BMs we can also.we should work on carrier killer BMs in my opinion, India can not stop them.they are not US.
Their guidance is achieved through advanced drones if they used the same method of using sensor nodes.
Possibly using some inertial methods which is numbers game. Otherwise they somehow also achieved communication with the maneuverable vehicle if it is done that way.
Possibly Chinese assistance for certain parts of this chain and sold the equipment for this guidance. This stuff has been done in China since 2010. Only directly shown in a full exhibit to USA a year ago which means the technique is quite old. Why show everything to Uncle Sam and show them exactly how the missile flies and how the vehicle separates and flies and is guided.